Opinion PER CURIAM.
PER CURIAM:
In this case petitioners seek review of two orders by the Nuclear Regulatory Commission (NRC) permitting the Metropolitan Edison Company to release radioactive gas into the atmosphere from the Three Mile Island nuclear plant.1 The claim here is that the orders issued by the NRC were made effective without affording petitioners their statutory rights to notice and a hearing.2
[61]*61On June 26, 1980, this court denied petitioners’ request for emergency injunctive relief to block the release of the radioactive gas. Now that the radioactive gas from the nuclear plant has been fully vented into the atmosphere, the petitioners seek only declaratory relief from this court.
I. BACKGROUND
This case arises in the aftermath of a widely publicized accident that occurred on March 28, 1979 at “Unit 2” of the Three Mile Island nuclear plant. As a result of the accident, dangerous concentrations of radioactive gas collected in the reactor containment building, inhibiting cleanup and maintenance work.
Three months after the accident, the NRC issued an “Order for Modification of License,” 44 Fed.Reg. 45,271 (1979), suspending Metropolitan Edison’s authority to operate Unit 2 of the Three Mile Island plant (TMI-2), and requiring it to “maintain the facility in a shutdown condition.” Id.3 The NRC order indicated that, in about thirty days, the Commission would issue a “Safety Evaluation” addressing “the imposition of new and/or revised Technical Specifications setting forth appropriate license conditions.” Id.
In fact, the NRC issued no such evaluation. Instead, on November 21, 1979, the NRC issued a “Statement of Policy and Notice of Intent to Prepare a Programmatic Environmental Impact Statement,” 44 Fed.Reg. 67,738 (1979), which was to be an “overall study of the decontamination and disposal process.” Id. The NRC Statement of Policy directed the agency’s staff
to include in the programmatic environmental impact statement on the decontamination and disposal of TMI-2 wastes an overall description of the planned activities and a schedule for their completion along with a discussion of alternatives considered and the rationale for choices made.
Id.
On February 11, 1980, the NRC issued another order, 45 Fed.Reg. 11,282 (1980), which stated that
the facility’s operating license should be modified so as to: ... (3) Prohibit venting or purging or other treatment of the reactor building atmosphere . . . until each of these activities has been approved by the NRC, consistent with the Commission’s Statement of Policy and Notice of Intent to Prepare a Programmatic Environmental Impact Statement.
Id
4
Six weeks later the NRC published a notice of the “Availability of Environmental Assessment for Decontamination of the Three Mile Island Unit 2 Reactor Building Atmosphere,” 45 Fed.Reg. 20,265 (1980). The notice stated that the Assessment “considers five alternative methods for decontaminating the reactor building atmosphere and recommends that the building atmosphere be decontaminated by purging to the environment through the building’s hydrogen control system.” Id.5 The NRC staff [62]*62concluded in the Assessment that venting the gas into the atmosphere would “not constitute a significant environmental impact and, accordingly, the staff does not propose to prepare a separate Environmental Impact Statement on this action.” Id. at 20,265 — 66. Public comments on the Assessment originally were due by April 11, 1980, but the period was extended to May 16, 1980. 45 Fed.Reg. 30,760 (1980).
In May of 1980, the NRC issued the “Final Environmental Assessment for Decontamination of the Three Mile Island Unit 2 Reactor Building Atmosphere.” On June 12, 1980, the NRC issued without a hearing two final orders, entitled “Order for Temporary Modification of License,” 45 Fed. Reg. 41,251 (1980), and “Memorandum and Order,” 2 Nuclear Reg.Rep. (CCH) ¶ 30,498.-01 (1980). The first order modified the operating license6 to permit the licensee to release the radioactive gas from the reactor building at a faster rate than the existing specifications allowed.7 The first order also expressly stated that, because the NRC had found that the modification of the operating license involved “no significant hazards consideration,” requests for a hearing would not stay the implementation of the order. 45 Fed.Reg. at 41, 252.8 The second order authorized release of radioactive gas from the reactor building.9 Venting was to begin on June 22.10
On June 16, petitioners wrote a letter to the NRC requesting that it reconsider its finding of “no significant hazards consideration” and its decision to make the June 12 orders effective immediately. The NRC did not respond.
On June 23, petitioners filed a petition in this court for review of the two June 12 orders.11 Three days later this court denied the petitioners’ requests for emergency injunctive and declaratory relief. The next day, one day before the venting began, the petitioners filed a request for a hearing with the NRC on the two June 12 orders. The hearing request was referred to an Atomic Safety and Licensing Board. On July 3, one of the petitioners in No. 1691 moved the Board to suspend the venting; however, this request was subsequently withdrawn, on July 8, shortly before the venting was completed.
Metropolitan Edison began to vent the reactor building on June 28, 1980, at a rate that was within the original license specifications for a normally operating reactor. On July 8, the licensee began to vent the radioactive gas at a faster rate, pursuant to the specifications set in the June 12 license amendment. The venting was completed on July 11. As the NRC had anticipated, the off-site doses from the venting were below the limits set in the June 12 radiation [63]*63license amendment. In its draft Programmatic Environmental Impact Statement, NUREG-0683, issued August 14, 1980, the Commission stated that it did not anticipate a recurrence of the purging of the reactor building atmosphere, but that some minor releases of gas might be necessary for data gathering purposes. See Brief for Respondent Nuclear Regulatory Commission at 6 n.4 & 20 n.11.
II. MOOTNESS
Because the licensee has completed the venting of the reactor containment building, and because both of the June 12 orders have expired, the Commission and the licensee claim that petitioners’ claims for injunctive and declaratory relief are moot.12 However, because we find that these cases are “capable of repetition, yet evading review,” 13 we hold that the petitioners’ claims are justiciable in this court.14
The mootness doctrine is primarily based on article III of the United States Constitution, which limits federal court jurisdiction to “cases” or “controversies.” Courts have interpreted the constitutional provision to limit their jurisdiction to “a present, live controversy of the kind that must exist if we are to avoid advisory opinions on abstract propositions of law.” Hall v. Beals, 396 U.S. 45, 48, 90 S.Ct. 200, 201, 24 L.Ed.2d 214 (1969). The case or controversy requirement “preserves the separation of powers” and “ ‘limit[s] the business of federal courts to questions presented in an adversary context and in a form historically viewed as capable of resolution through the judicial process.’ ” Tennessee Gas Pipeline Co. v. Federal Power Comm’n, 606 F.2d 1373, 1379 (D.C.Cir.1979) (quoting Flast v. Cohen, 392 U.S. 83, 95, 88 S.Ct. 1942, 1950, 20 L.Ed.2d 947 (1968)).
Cases arising from agency action, no less than cases involving only private parties, are subject to the mootness doctrine. Yet, as this court has recently noted, “the concept of mootness is placed under some strain in the context of administrative orders whose formal legal effect is typically shortlived.” Tennessee Gas Pipeline Co. v. Federal Power Comm’n, 606 F.2d at 1379-80. The strain is relieved somewhat by, an exception first articulated in Southern Pac. Terminal Co. v. Interstate Commerce Comm’n, 219 U.S. 498, 31 S.Ct. 279, 55 L.Ed. [64]*64310 (1911), where the Supreme Court held that technically moot cases are justiciable if they involve “short term orders, capable of repetition, yet evading review.” Id. at 515, 31 S.Ct. at 283.
A case is considered justiciable if “the litigant show[s] the existence of an immediate and definite governmental action or policy that has adversely affected and continues to affect a present interest.” Super Tire Engineering Co. v. McCorkle, 416 U.S. 115, 125-26, 94 S.Ct. 1694, 1699-1700, 40 L.Ed.2d 1 (1974). As this case demonstrates, administrative orders, like labor disputes, often “do not last long enough for complete judicial review of the controversies they engender .... The judiciary must not close the door to the resolution of the important questions these concrete disputes present.” Id. at 126-27, 94 S.Ct. at 1700-1701. Yet, in order to invoke the Southern Pacific exception, the petitioner must not only show that “the challenged action was in its duration too short to be fully litigated prior to its cessation or expiration,” he must also show that “there was a reasonable expectation that the same complaining party would be subjected to the same action again.” Weinstein v. Bradford, 423 U.S. 147, 149, 96 S.Ct. 347, 349, 46 L.Ed.2d 350 (1975).
The issue in the present case is not simply whether the NRC will again purge the reactor building atmosphere without first giving notice and holding a hearing. At stake is whether the NRC will continue its policy of making immediately effective license amendments without holding a hearing, even though petitioners request one, whenever the NRC finds that the amendment involves “no significant hazards consideration.”
Under this view of the issues in this case, the conditions for avoiding dismissal on grounds of mootness, set forth in Weinstein, are met. The Commission has candidly conceded that
at some point in the TMI-2 cleanup, perhaps on more than one occasion, the Commission will amend the utility’s license in respects so minor that the Commission will think itself justified in making the amendment immediately effective based upon a no significant hazards consideration finding. Certainly, that kind of finding has been utilized in the past.
Brief for Respondent Nuclear Regulatory Commission at 23.15 The Commission plainly intends to adhere to its policy of denying a hearing on a license amendment, under certain circumstances, even though interested parties specifically request a hearing. The chances of recurrence are more than speculative; because the NRC policy will be carried out during the TMI-2 cleanup, there is a “reasonable expectation that the same complaining parties]” will be denied their alleged statutory rights to hearing and notice.
As the present case demonstrates, challenges to the NRC’s policy of denying a hearing on license amendments may well escape review. The difficulty here is that the orders are often shortlived and the NRC actions, like venting, may be irreversible. The difficulty is compounded when the NRC elects, as in this case, to make its orders effective immediately. These considerations indicate that future challenges to the NRC policy may easily “evade review.”
[65]*65This court has stated that “[t]he situations [involving appellate consideration of recurrent controversies] are necessarily variant, and the variables complex.... [T]he court’s decision to maintain the appeal, in the interest of sound judicial administration, is dependent on a prediction of a recurrence or continuation of what is perceived to be essentially the same legal dispute.” Alton & Southern Railway Co. v. International Ass’n of Machinists & Aerospace Workers, 463 F.2d 872, 879 (D.C.Cir. 1972). “While an ‘effective remedy’ for the immediate dispute is not obligatory, there must be at least a capacity for a declaration of legal right concerning a future projection of the actual dispute that precipitated the litigation.” Id. at 879-80. In the present case, that capacity exists, and we hold that this case is not moot.
III. THE ORDER FOR TEMPORARY MODIFICATION OF LICENSE
The NRC issued without a hearing the “Order for Temporary Modification of License” (OTML) of June 12, 1980, which substituted off-site dosage limits for release limits in the TMI-2 operating license. The petitioners contend that the NRC’s failure to provide a hearing violated section 189(a) of the Atomic Energy Act of 1954. The first sentence of that section provides in relevant part:
In any proceeding under this chapter, for the granting, suspending, revoking, or amending of any license or construction permit . . . the Commission shall grant a hearing upon the request of any person whose interest may be affected by the proceeding, and shall admit any such person as a party to such proceeding.
The NRC and Metropolitan Edison do not dispute that the OTML constituted a license amendment subject'to the terms of section 189(a). They do maintain, however, that under the fourth sentence of the section the Commission could dispense with a hearing. The fourth (and last) sentence of section 189(a) reads:
The Commission may dispense with such thirty days’ notice and publication with respect to any application for an amendment to a construction permit or an amendment to an operating license upon a determination by the Commission that the amendment involves no significant hazards consideration.
The NRC and the licensee argue that the NRC properly made a finding of “no significant hazards consideration” with respect to the OTML, and that consequently a hearing was not required. Although the last sentence of section 189(a) only explicitly “dispense[s] with . . . thirty days’ notice and publication” upon a determination of “no significant hazards consideration,” the NRC and the licensee contend that such a determination also permits the Commission to dispense with a hearing because notice and a hearing are inextricable.16
We are convinced that such a finding did not permit the NRC to dispense, with a hearing that is otherwise required by section 189(a).17 This is not the first case in this circuit in which it has been argued that a finding of “no significant hazards consideration” permits the NRC to issue a license amendment without a hearing. In Brooks [66]*66v. Atomic Energy Comm’n, 476 F.2d 924, 926 (D.C.Cir.1973) (per curiam) this court soundly rejected the contention that the fourth sentence in section 189(a) “indicate[d] Congressional intent to dispense with hearings in construction permit amendment proceedings . . . when the Commission determines that the amendment involves ‘no significant hazards consideration.’ ” Instead this court, after an examination of the legislative history of section 189(a), held that the fourth sentence only dispenses with requirements of notice and publication. Because this circuit has previously rejected the very construction of section 189(a) offered by the NRC and the licensee,18 the doctrine of stare decisis compels us to hold that the NRC improperly failed to provide a hearing in the instant case.
Moreover, even if this court were not bound by stare decisis, we would still adopt the Brooks interpretation of the last sentence of section 189(a). The plain language of section 189(a) dispels any notion that by a finding of “no significant hazards consideration” the NRC may dispense with the hearing requirement. The fourth sentence makes no mention of the hearing requirement’s being lessened, but makes reference only to the requirements of notice and publication. Despite the plain, unambiguous language contained in the last sentence, the NRC and Metropolitan Edison suggest that the requirements of hearing and notice are so intertwined that the reference to notice in the fourth sentence must also comprehend a hearing. While it is true that requirements of notice and hearing are interrelated, it is clear that Congress was not merging them in section 189(a). That is demonstrated by the third sentence of the section where Congress made explicit reference to the hearing requirement.19 That sentence plainly demonstrates that Congress did indeed intend to disentangle the two requirements of notice and hearing,20 and “to lessen the mandatory hearing requirement only when there was no request for a hearing.” Brooks v. Atomic Energy Comm’n, 476 F.2d at 927.
A review of the legislative history of the 1962 amendments to section 189(a) — by which the last two sentences of the section were added — also firmly persuades us that the Brooks court properly construed the last sentence of section 189(a). That history demonstrates that the 1962 amendments to section 189(a) had their origin in congressional concern over a hearing requirement [67]*67in uncontested cases — that is, when a hearing had not been requested.21 Representative of that concern was the statement by Raoul Berger, serving as an American Bar Association spokesperson, that
14 out of 15 of [the Atomic Energy Commission’s] cases have been uncontested. And the central problem appears to be whether trial-type proceedings should be employed under sections 7 and 8 of the Administrative Procedures [sic] Act in uncontested cases ....
AEC Regulatory Problems: Hearings on H.R. 12336 and S. 3491 Before the Sub-comm. on Legislation of the Joint Comm. on Atomic Energy, 87th Cong., 2d Sess. 64 (1962) (statement of Raoul Berger) (emphasis added).22 Accord, e. g., id. at 32 (statement of Herzel H. E. Plaine, Chairman, Special Comm, on Atomic Energy Law, ABA). Thus an interpretation of section 189(a) that would permit the NRC to issue a contested license amendment without a hearing would enlarge section 189(a) beyond the scope originally intended.23
The 1962 Report of the Joint Committee on Atomic Energy also suggests that Congress perceived the changes to section 189(a) as permitting the NRC to dispense only with notice and publication — not a hearing — upon a finding of “no significant hazards consideration”:
In the absence of a request for a hearing, issuance of an amendment to a construction permit, or issuance of an operating license, or an amendment to an operating license, would be possible without formal proceedings, but on the public record....
Finally, it is expected that the authority given AEC to dispense with notice and publication would be exercised with great care and only in those instances where the application presented no significant hazards consideration.
H.R.Rep.No.1966, 87th Cong., 2d Sess. 8 (1962), U.S.Code Cong. & Admin.News 1962, pp. 2207, 2214, S.Rep.No.1677, 87th Cong., 2d Sess. 8 (1962), U.S.Code Cong. & Admin. News 1962, pp. 2207, 2214 (emphasis added). And in a committee hearing one year prior, the Joint Committee on Atomic Energy had noted:
When no substantial safety question is involved in . . . the amendment . . . the public interest would be protected by . . . publication of an apt notice in the Federal Register [24] and the giving of an oppor[68]*68tunity to any interested party to intervene. . . .
Staff of the Joint Comm. on Atomic Energy, 87th Cong., 1st Sess., Improving the Regulatory Process, Vol. II, at 49-50 (Comm. Print 1961) (emphasis added). The language of the reports, consonant with the plain meaning of section 189(a), thus indicates that the section only permits the NRC to issue a license amendment without a hearing when there has been no hearing request.25
Statements by Representative Holifield, Chairman of the Joint Committee on Atomic Energy, and Senator Pastore, Vice-Chairman, on the floors of their respective houses further reinforce the language in the reports. Both individuals explicitly stated that the “amendment [to section 189(a)] in no way limits the right of an interested party to intervene and request a hearing at some later stage, nor does it affect the right of the Commission to hold a hearing on its own motion.” 108 Cong.Rec. 16,548 (1962) (remarks of Rep. Holifield); see id. at 15,-746 (remarks of Sen. Pastore). The interpretation that the NRC and the public utilities press upon us,26 however, would “limit[ ] the right of an interested party to intervene and request a hearing.”
In sum, we are confident that Brooks was properly decided and that it dictates the construction that must be attached to the last sentence of section 189(a). Because the NRC’s finding of “no significant hazards consideration” did not entitle the Commission to dispense with a requested hearing prior to issuance of the OTML, we hold that its failure to provide a hearing violated section 189(a) of the Atomic Energy Act.
[69]*69IV. THE NRC’S MEMORANDUM AND ORDER
The second order issued by the NRC on June 12, 1980, entitled “Memorandum and Order” (Venting Order), authorized Metropolitan Edison to vent the atmosphere of the reactor containment building. Respondents argue that section 189(a) did not require a hearing with respect to the Venting Order because the order was not a license amendment. We reject respondents’ description of the order and find that section 189(a) was indeed applicable and, as a consequence, that petitioners were entitled to a hearing on the Venting Order.
Section 189(a), quoted in pertinent part in note 2 supra, requires that a hearing be given upon request “[i]n any proceeding under this chapter, for the granting, suspending, revoking, or amending of any license or construction permit.” 42 U.S.C. § 2239(a) (1976). Respondents maintain that because the Venting Order merely lifted a prior suspension of the licensee’s authority to vent, and did not authorize release of a greater amount of radioactive gas than was permitted by the original technical specifications of the operating license, it was not a license amendment. However, on the facts here, this characterization of the Venting Order appears to be nothing more than an after-the-fact rationalization, which finds no support in the record of this case.
The NRC’s July 20,1979 “Order for Modification of License” suspended Metropolitan Edison’s authority to operate TMI-2 and directed the licensee to “maintain the facility in a shutdown condition in accordance with the approved operating and contingency procedures.” 44 Fed.Reg. 45,271 (1979). In a second order, dated February 11, 1980, the NRC recognized that TMI-2’s operating license did not permit venting as part of a cleanup operation because the license specifications pertained only to normal operation of the facility:
P]n the present post-accident status of the facility, the license itself does not include explicit provisions or Technical Specifications for assuring the continued maintenance of the plant in a safe, stable condition or for coping with foreseeable off-normal conditions. Moreover, certain portions of the facility’s operating license relate to or govern power operation of the facility, the authority for which was suspended by the Order of July 20, 1979. These provisions are now simply inapplicable to the facility in its present post-accident condition.
45 Fed.Reg. 11,282 (1980) (emphasis added). The NRC concluded that “the facility’s operating license should be modified so as to:
. . . [p]rohibit venting or purging . . . until . . . approved by the NRC.” Id. (emphasis added).
There is no indication that this order was intended or perceived as a mere suspension of the licensee’s existing authority to vent. In February 1980, it appeared that adequate venting of the reactor building might not be possible under the existing license authority. Consequently, the NRC acted to modify — and thus amend — the TMI-2 license in order to regulate the plant in an “off-normal” condition and to facilitate whatever venting scheme might be determined to be necessary. By its very terms, the February 11, 1980 order was a license amendment intended to reflect TMI-2’s post-accident condition. Given that the original operating license was inapplicable, the NRC could not simply rely on its terms as authority for the venting. Authority for venting — in this case the June 12 Venting Order — therefore had to come in the form of a license amendment.
The specific language of the June 12 Venting Order further corroborates our interpretation of that order as a license amendment. In the Venting Order, the NRC noted that TMI-2 was being operated according to the provisions of the February 11, 1980 order, see 2 Nuclear Reg.Rep. (CCH) ¶ 30,498.01, at 29,456 (1980), and the Venting Order did nothing to change that. TMI-2’s operating license was not simply “unsuspended” by the Venting Order. Instead, in the words of the NRC, “[i]n the present order we give the approval contemplated by [the February 11] restriction insofar as necessary for the licensee to conduct [70]*70a purging of the TMI — 2 containment.” Id. at 29,456-57. Nowhere does the Venting Order support respondents’ characterization of it as a reinstatement of some preexisting authority. Rather, the Venting Order appears as an amendment to the February 11 amendment to TMI-2’s operating license. Because the June 12 Venting Order modified the February 11 order, and granted the licensee authority to do something that it otherwise could not have done under the existing license authority, the Venting Order was a license amendment within the scope of section 189(a).
Our reading of the Venting Order is also supported by Congress’ intent in enacting section 189(a). By requiring a hearing upon request whenever a license is “grant[ed], suspend[ed], revok[ed], or amend[ed],” Congress apparently contemplated that interested parties would be able to intervene before any significant change in the operation of a nuclear facility. Whatever the Venting Order is called, it certainly was such a change.
As we held in Section III of this opinion, the NRC is required under section 189(a) to hold a hearing on a license amendment whenever interested parties request one.27 Petitioners did so in this case, see note 25 supra, and the NRC therefore acted unlawfully in refusing to hold a hearing on the Venting Order.28
V. CONCLUSION
Because the NRC’s actions in this case are “capable of repetition, yet evading review,” the issues presented by petitioners are not moot. We hold that under section 189(a) the NRC is required to hold a hearing on license amendments whenever interested parties request one. Finally, we hold that the June 12 Venting Order, which authorized the NRC to release radioactive gas from the disabled nuclear reactor, was a license amendment subject to the hearing requirements of section 189(a). Because the petitioners requested a hearing on the two June 12 license amendments, they were entitled to a hearing under section 189(a). The NRC’s refusal to hold a hearing violated the petitioners’ statutory rights.