ML041130095

Proposed License Amendment for a Limited Scope Application of the Alternate Source Term (NUREG-1465) for Re-evaluation of the Fuel Handling Accident Dose Consequences

ML041130095
Person / Time
Site:	Pilgrim
Issue date:	04/14/2004
From:	Balduzzi M Entergy Nuclear Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
2.04.003, NUREG-1465
Download: ML041130095 (33)

Text

Entergy Entergy Nuclear Operations, Inc.

Pilgrim Nuclear Power Station 600 Rocky Hill Road Plymouth, MA 02360 Michael A. Balduzzi Site Vice President April 14, 2004 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852

SUBJECT:

Pilgrim Nuclear Power Station Docket No. 50-293 License No. DPR-35 Proposed License Amendment for a Limited Scope Application of the Alternate Source Term (NUREG-1465) for Re-evaluation of the Fuel Handling Accident Dose Consequences

REFERENCE:

1. NUREG-1465, "Accident Source Terms for Light-Water Nuclear Power Plants," February 1995. J

2. Regulatory Guide 1.183, "Alternative Radiological Source Terms for Evaluating Design Basis Accident at Nuclear Power Reactors," July 2000.

LETTER NUMBER: 2.04.003

Dear Sir:

Pursuant to 10 CFR 50.90 and 50.67, Entergy hereby proposes to amend Appendix A, Technical Specifications of Pilgrim's Operating License, to change the requirements associated with handling irradiated fuel and performing core alterations. Specifically, the changes would eliminate operability requirements for secondary containment when handling sufficiently decayed irradiated fuel and performing core alterations, and clarify requirements associated with operations with potential to drain the reactor vessel (OPDRVs). The changes proposed in this application are consistent with TSTF-51, "Revise Containment Requirements During Handling Irradiated Fuel and Core Alterations." Entergy is proposing to revise the requirements associated with equipment whose performance is not credited in the new calculations.

In support of these changes, Entergy has completed new design-basis calculations using a selective implementation of alternate source term (AST) guidance for evaluating the potential dose consequences of a fuel handling accident. These calculations use the guidelines detailed in NUREG-1465 (Reference 1) and Regulatory Guide 1.183 (Reference 2). The calculations demonstrate that radiological doses at the exclusion area boundary (EAB), low population zone (LPZ) and in the control room (CR) are within allowable limits without crediting secondary containment operability and operation of the standby gas treatment system and control room high efficiency air filtration system.

204003

Entergy Nuclear Operations, Inc. Letter Number: 2.04.003 Pilgrim Nuclear Power Station Page 2 Entergy has evaluated the proposed changes in accordance with 10 CFR 50.91 (a)(1) using the criteria in 10CFR50.92(c) and has determined that this request involves no significant hazards considerations.

The scope and content of the proposed changes is similar to the recently NRC approved Technical Specification changes for James A. FitzPatrick (TAC No. MB5328) and Duane Arnold (TAC NO. MB13569).

The commitments made in this letter by the licensee are listed in Attachment 6 of this letter.

Entergy requests NRC review and approval of this proposed change by March 1, 2005 to support the Pilgrim refueling outage-15 in April 2005.

Please contact Mr. Bryan Ford at (508) 830-8403, if you have any questions.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on the 14th day of April 2004.

Sincerely, Mh ABu Michael A. Balduzzi 204003

Entergy Nuclear Operations, Inc. Letter Number: 2.04.003 Pilgrim Nuclear Power Station Page 3 Attachments: 1. Proposed License Amendment for a Limited Scope Application of the Alternate Source Term Guidelines in NUREG-1465 for Re-evaluation of the Fuel Handling Accident Dose Consequences (30 pages)

2. Entergy Calculation No. PNPS-1-ERHS-XXII.A-2, Rev.1, "Radiological Consequences of a Design Basis Fuel Handling Accident using the Alternate Source Term" (48 pages)

3. Entergy Calculation No. PNPS-1-ERHS-II.B-4, Rev. 1, "Control Room and Technical Support Center Accident X/Q's Using ARCON96" (49 pages)

4. Proposed Changes to the Pilgrim Technical Specifications - Marked-Up Pages (13 pages)

5. Retyped Technical Specification and Bases Pages (12 pages)

6. Summary of Commitments cc: Mr. Travis Tate, Project Manager Ms. Cristine McCombs Office of Nuclear Reactor Regulation Mass. Emergency Management Agency Mail Stop: 0-8B-1 400 Worcester Road U.S. Nuclear Regulatory Commission Framingham, MA 01702 1 White Flint North 11555 Rockville Pike Rockville, MD 20852 Mr. Robert Walker, Director Senior Resident Inspector Massachusetts Department of Public Health Pilgrim Nuclear Power Station Radiation Control Program 90 Washington Street Dorchester, MA 02121 U.S. Nuclear Regulatory Commission Region 1 475 Allendale Road King of Prussia, PA 19408 204003

Subject:

Proposed License Amendment for a Limited Scope Application of the Alternate Source Term Guidelines in NUREG-1465 for Re-evaluation of the Fuel Handling Accident Dose Consequences List of Tables

2.0 PROPOSED CHANGE

2.1 Description of Proposed Changes

3.0 BACKGROUND

AND BASIS FOR PROPOSED TS CHANGE

4.0 TECHNICAL ANALYSIS

4.1 Alternate Source Term 4.2 Atmospheric Dispersion (X/Q) 4.3 Radiological Consequences of a Design-Basis Fuel Handling Accident 4.4 Results of Fuel Handling Accident Dose Consequences 4.5 Core Alterations 4.6 Operations with Potential for Draining the Reactor Vessel (OPDRVs) 5.0 REGULATORY SAFETY ANALYSIS 5.1 No Significant Hazards Consideration 5.2 Applicable Regulatory Requirements/Criteria 5.3 Conclusion

7.0 REFERENCES

1

List of Tables

1. Summary of Proposed Changes to the Technical Specifications

2. Atmospheric Dispersion Factors (X/Q's) for Control Room X/Q

3. Key Inputs for Fuel Handling Analysis

4. Radiological Dose Effects of Fuel Handling Accident

5. Comparison of Current Licensing Basis (CLB) and Alternate Source Term (AST)

Radiological Doses as a result of a Fuel Handling Accident 2

1.0 DESCRIPTION

Pursuant to 10 CFR 50.90 and 50.67, Entergy hereby proposes to amend Appendix A, Technical Specifications (TS) of the Pilgrim operating license to change the requirements for handling irradiated fuel and performing core alterations. Specifically, the changes would eliminate operability requirements for secondary containment when handling sufficiently decayed irradiated fuel and performing core alterations, and clarify requirements associated with operations with potential to drain the reactor vessel (OPDRVs). Entergy is proposing to revise the requirements associated with equipment whose performance is not credited in the new calculations.

Pilgrim Technical Specifications currently impose restrictions on plant operations when handling irradiated fuel assemblies or performing core alterations. These restrictions require that certain structures, systems or components (SSCs) be operable. These restrictions assure that the radiological consequences of a fuel handling accident do not exceed those estimated in design-basis analyses.

The changes proposed in this application are consistent with TSTF-51, "Revise Containment Requirements During Handling Irradiated Fuel and Core Alterations,"

(Reference 20). TSTF-51 removes Technical Specification requirements for engineered-safeguard features (ESF) (e.g., primary/secondary containment, standby gas treatment, isolation capability) to be operable after sufficient radioactive decay has occurred to ensure off-site doses remain below the Standard Review Plan limits. TSTF-51 also deletes operability requirements during core alterations for ESF mitigation features.

A "Fuel Handling Accident" (FHA) (or refueling accident) is discussed in Section 14.5.5 of the Pilgrim Updated Final Safety Analysis Report (UFSAR). UFSAR Table 14.5-5 provides radiological consequences of a fuel handling design basis accident.

Attachments 2 and 3 provide supporting calculations for the revised FHA analysis.

Secondary containment, the standby gas treatment system (SGTS), and control room high efficiency air filtration system (CRHEAFS) mitigate the potential effects of a fuel handling accident and are part of the primary success path for a design-basis FHA.

Section 10.17 of the Pilgrim UFSAR describes the main control room environmental control system. The main control room environmental control system has a safety-related subsystem that is referred in Technical Specifications as the CRHEAFS. Section 10.9.3.3 of the UFSAR describes the reactor building ventilation system. Section 5.3 of the UFSAR describes SGTS and secondary containment requirements.

The implementation of these changes could reduce the duration and cost of planned outages while maintaining an adequate safety margin. For example, moving large equipment into secondary containment during an outage must be coordinated with Technical Specification requirements for secondary containment operability. This limits how and when the equipment can be moved, which in turn, can result in delays to certain "critical path' activities and extend outage duration.

Another potential benefit involves the performance of maintenance or repair work on redundant "divisionalized" safety systems. This work is usually scheduled to ensure that one division is operable while work is performed on the other division. Unanticipated problems with the operable division could require the suspension of the movement of irradiated fuel or other core alterations, such as control rod drive testing, until the problem is corrected and the system returned to operable status. The proposed change could also facilitate maintenance or repairs on non-redundant portions of CRHEAFS without suspending refueling activities.

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Entergy requests NRC review and approval of the proposed changes by March 1, 2005 to support the Pilgrim refueling outage-15 in April 2005.

2.0 PROPOSED CHANGE

The proposed amendment would change the Limiting Conditions for Operation (LCOs) in Pilgrim Technical Specifications (TS) to relax secondary containment operability requirements when handling fuel that is not "recently" irradiated. The proposed change would allow for more efficient performance of outage work while continuing to provide adequate controls against the release of fission product radioactivity to the outside atmosphere during fuel handling activities.

Current Technical Specifications (Table 3/4.2.D, Specifications 3/4.7.B and 3/4.7.C) require secondary containment, together with SGTS and CRHEAFS to be operable:

(1) During movement of irradiated fuel, (2) During movement of new fuel over the spent fuel pool, (3) During core alterations, and (4) During operations with the potential for draining the reactor vessel (OPDRVs).

Changes are proposed to the secondary containment isolation requirements in TS Table 3/4.2.D and SGTS, CRHEAFS, and Secondary Containment operability requirements specified in TS 3/4.7.B.1 and .2, and TS 3/4.7.C for refueling operations based on the revised FHA. The proposed changes will eliminate operability requirements during fuel handling activities that do not involve "recently" irradiated fuel and during core alterations.

The systems will still be required to be operable during OPDRVs and during fuel handling activities involving recently irradiated fuel. The proposed changes maintain requirements for SGTS operability during OPDRVs consistent with Pilgrim License Amendments 166 and 170.

Changes to the TS bases define what time period must elapse before fuel is no longer considered "recently" irradiated. For the current cycle-15 (GE 10x10 fuel type), the minimum time period that must elapse following reactor shutdown is 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. The time period is cycle-specific based upon the type of fuel used, fuel performance during the cycle and the Alternate Source Term (AST) methodology in accordance with 10 CFR 50.67. This is included in the TS Bases to reflect the proposed changes to the Specifications.

2.1 Description of Proposed Changes Entergy is proposing to modify (a)the licensing basis of the Fuel Handling Accident (FHA) as described in the Pilgrim UFSAR and (b)Technical Specifications for the secondary containment isolation requirements in TS Table 3/4.2.D and operability requirements of SGTS, CRHEAFS, and secondary containment specified in TS 3/4.7.B.1 and .2, and TS 3/4.7.C for refueling operations based on the revised FHA.

1. Licensing Basis Change for Fuel Handling Accident Entergy is revising the licensing basis of the FHA described in Section 14.5.5 of the Pilgrim UFSAR. The proposed licensing basis change is the re-evaluation of the FHA using Alternate Source Term methodology and dose consequences analysis in accordance with 10 CFR 50.67, Regulatory Guide (R.G.) 1.183, NUREG-1465, and TSTF-51. Sections 3.0 and 4.0 of this evaluation provide technical analysis in 4

support of the licensing basis change. Entergy plans to revise Sections 14.5.5 and 5.3 of the UFSAR describing the revised FHA and secondary containment operability requirements upon receipt of the approved license amendment and to submit revised UFSAR Sections pursuant to 10 CFR 50.71(e).

2. Technical Specification Bases Changes Based on TSTF-51, Entergy is revising TS Bases B3/4.7.B.1 describing "recently irradiated fuel assemblies" as fuel that has occupied part of a critical reactor core within the previous 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> (i.e. irradiated fuel decayed for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />). This change is derived from the above proposed licensing basis change for postulated fuel handling accident (UFSAR Section 14.5.5) using AST in accordance with 10 CFR 50.67 and R.G. 1.183.

The 48-hour decay period is for the current fuel cycle-15 using the GE fuel Type 10x10. Thereafter, each fuel cycle will be evaluated prior to the succeeding refueling outage to derive the applicable decay period for the fuel cycle. If required, the TS Bases will be revised in accordance with 10 CFR 50.59 to ensure Pilgrim remains in compliance with the secondary containment isolation and operability requirements of SGTS and CRHEAFS for movement of recently irradiated fuel assemblies.

3. Technical Specification Changes Analyses of the radiological dose analysis of a postulated FHA involving irradiated fuel assembles that have been allowed to decay for at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> show that the calculated total effective dose equivalent (TEDE) values to the control room occupants and at the exclusion area boundary without crediting Secondary Containment, SGTS and CRHEAFS operations are below the allowable TEDE limits established in 10 CFR 50.67 (see Section 4.0 of this evaluation). Therefore, after 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, movement of irradiated fuel assembles can commence and continue without the operability requirements for SGTS, CRHEAFS, and Secondary Containment. This conclusion (see Section 4.4 of this evaluation) forms the basis for the proposed TS changes.

Since secondary containment operability is not required during the movement of fuel assemblies that are not recently irradiated, the secondary containment isolation requirements (TS 3/4.2.D, Table 3.2.D), and operability requirements for SGTS (TS 314.7.B.1), CRHEAFS (TS 3/4.7.B.2), and secondary containment (TS 3/4.7.C) are revised to be applicable only when handling recently irradiated fuel assemblies, consistent with TSTF-51.

The requirement of "movement of new fuel over the spent fuel" is deleted in Specifications 3.7.B.1.a, .c, and .e; 3.7.B.2.a, .c, and .e, and 3.7.C. because the consequences of an accident involving movement of new fuel over the spent fuel are bounded by the analysis performed for irradiated fuel.

The operability requirements during CORE ALTERATIONS for ESF mitigation features are deleted as part of this proposed license amendment. The accidents postulated to occur during core alterations, in addition to the postulated FHA, are inadvertent criticality due to control rod removal error and the inadvertent loading of, and subsequent operation with, a fuel assembly in an improper location. Except for the FHA, these other events are not postulated to result in fuel cladding integrity damage. Since the only accident postulated to occur during CORE ALTERATIONS that results in significant radioactive release is the fuel handling accident, the 5

proposed TS changes omitting CORE ALTERATIONS is justified.

License Amendments 166 and 170 revised the operability requirements of secondary containment, SGTS, and CRHEAFS for startup, run, and hot shutdown modes, during movement of irradiated fuel assemblies, during movement of new fuel over the spent fuel pool, during core alterations, and during OPDRVs. The revised FHA does not alter the operability requirements for OPDRV conditions. Thus, operability requirements for OPDRVs are retained. Operability requirements for OPDRVs are added in TS Table 3.2.D Actions A and B, and Specifications 3/4.7.B.1 .e (SGTS) and 3/4.7.B.2.e (CRHEAFS) since OPDRVs events can be postulated to cause fission product release to the secondary containment. Since secondary containment is the only barrier to release of fission products to the environment, secondary containment operability is required during OPDRVs. Thus, if one train of SGTS and CRHEAFS is not operable during OPDRVs, actions must be initiated to suspend OPDRVs.

Accordingly, requirements for operability during OPDRVs are added to Specifications 3/4.7.B.1.e (SGTS) and 3/4.7.B.2.e (CRHEAFS). These additional requirements are more restrictive and are consistent with the License Amendments 166 and 170.

The proposed Pilgrim TS changes follow TSTF-51 and recently approved James A.

Fitzpatrick and Duane Arnold license amendments. Even though Pilgrim's current TS appear different in style than the TSTF-51, the proposed changes are consistent with TSTF-51 requirements, and approved James A. Fitzpatrick and Duane Arnold TS changes in scope and requirements.

A summary of the proposed TS changes are presented in Table 1:

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TABLE 1 - Summary of Proposed Changes to the Technical Specifications Technical Title Add Delete CORE Operations with a Specification "recently ALTERATIONS potential for Draining Section irradiated ?  ? the Reactor Vessel Requirement Clarified?

3/4.2.D. Secondary Containment Isolation and SGTS YES N/A YES Actuation Instrumentation, (Table 3.2.D) 3/4.7.B.1. Standby Gas Treatment System YES YES YES (SGTS) 3/4.7.B.2. Control Room High Efficiency Air Filtration System YES YES YES (CRHEAFS) 3/4.7.C Secondary Containment YES YES YES The proposed TS changes are discussed below:

a. TS Table 3.2.D (TS Page 3/4.2-24):

The "Action" statements A and B are revised as follows:

Current TS Proposed TS (See Note below)

A. Cease operation of the refueling A. Cease operationof the-refueling equipment. equpment movement of recently irradiated fuel assemblies and B. Isolate secondary containment operations with potential to drain and start the standby gas the reactor vessel (OPDRVs).

treatment system.

B. Isolate secondary containment and start the standby gas treatment system during movement of recently irradiated fuel assemblies and OPDRIVs.

Notes: Proposed changes are indicted in italics.

This proposed change does not alter the isolation set points or capability of the secondary containment, but provides consistency for the secondary containment operability requirements in accordance with TSTF-51. OPDRVs is added to the Actions A and B to be consistent with TS 3/4.7.B.1.e.

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b. TS 3/4.7.B.1 .a, .c, and .e (TS naaes 3/4.7-11. 12and 13) for SGTS:

(i) TS 3/4.7.B.1.a is revised as follows:

Current TS I Proposed TS

1. Standby Gas Treatment System 1. Standby Gas Treatment System

a. Except as specified in 3.7.B.1.c a. Except as specified in 3.7.B.1.c or 3.7.B.1.e below, both trains of or 3.7.B.1 .e below, both trains of the standby gas treatment shall the standby gas treatment shall be operable when in the Run, be operable when in the Run, Startup, and Hot Shutdown Startup, and Hot Shutdown MODES, during movement of MODES, during movement of irradiated fuel assemblies in the recently irradiated fuel secondary containment, and assemblies in the secondary during movement of new fuel containment, and du4n9 over the spent fuel pool, and sw s cf nzt' fuc!l bo r mKansans stho during CORE ALTERATIONS, spent fuel pool, and during and during operations with a GORE-ALTERATIONS, and potential for draining the reactor during operations with a potential vessel (OPDRVs), for draining the reactor vessel (OPDRVs),

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(ii) TS 3/4.7.B.1.c is revised as follows:

Current TS I Proposed TS

c. From and after the date that one c. From and after the date that one train train of the Standby Gas of the Standby Gas Treatment Treatment System is made or System is made or found to be found to be inoperable for any inoperable for any reason, continued reason, continued reactor reactor operation, irradiatedfu:e operation, irradiated fuel handling, handling,- r newfu-l handling owvr or new fuel handling over the the pent fuel pool is permissible only spent fuel pool is permissible only during the succeeding seven days during the succeeding seven days providing that within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> all active providing that within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> all components of the other standby gas active components of the other treatment train are verified to be standby gas treatment train are operable and the diesel generator verified to be operable and the associated with the operable train is diesel generator associated with operable.

the operable train is operable.

If the system is not made fully If the system is not made fully operable within 7 days, reactor operable within 7 days, reactor shutdown shall be initiated and the shutdown shall be initiated and the reactor shall be in cold shutdown reactor shall be in cold shutdown within the next 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> and fue within the next 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> and fuel handflng operations shal! b handling operations shall be thrminatePd within 2 hour-.

terminated within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

7 tl -, 5U45,ruaain nnJ'anin In Iany r ,, Ax

- t, ,-e ,v Fuel handling operations in may)b cobGmpctle progress may be completed.

Notes:

The consequences analysis for the postulated FHA has shown that SGTS is not required for the handling of fuel assemblies that are not recently irradiated. The requirements of 3/4.7.B.1.e (SGTS) have been expanded to include handling of recently irradiated fuel assemblies whether or not the plant is operating at the time.

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(iii) TS 3/4.7.B.1.e is revised as follows:

Current TS l Proposed TS

e. From and after the date that one e. From and after the date that one train of the Standby Gas Treatment train of the Standby Gas Treatment System is made or found to be System is made or found to be inoperable for any reason during inoperable for any reason during Refuel Outages, refueling operations Refuc! Outages, refuelny are permissible only during the eperations, movement of recently succeeding 7 days providing that irradiated fuel assemblies and within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> all active components operations with a potential for of the other train are verified to be draining the reactor vessel operable and the diesel generator (OPDRVs) are permissible only associated with the operable train is during the succeeding 7 days operable. providing that within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> all active components of the other train If the system is not made fully are verified to be operable and the operable within 7 days, diesel generator associated with the operable train is operable.

i) place the operable train in operation immediately If the system is not made fully operable within 7 days, or i) place the operable train in ii) suspend movement of irradiated operation immediately.

fuel assemblies in secondary containment or new fuel handling OR over the spent fuel pool or core.

ii) suspend movement of recently Any fuel assembly movement in irradiated fuel assemblies in progress may be completed. secondary containment and initiate actions to suspend OPDRVs or new fuel handling ovor-th o...pe tfue pool oroorn Any fuel assembly movement in progress may be completed.

Notes:

The insertion of operability requirements for OPDRVs is consistent with License Amendment 166 and 170 and is added to ensure actions are clear. The consequences analysis for the postulated FHA has shown that SGTS is not required for the handling of fuel assemblies that are not recently irradiated.

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c. TS 3/4.7.B.2.a (TS pages 3/4.7-14) for CRHEAFS:

(i) TS 3/4.7.B.2.a is revised as follows:

Current TS I Proposed TS

a. Except as specified in Specification a. Except as specified in Specification 3.7.B.2.c or 3.7.B.2.e below, both 3.7.B.2.c or 3.7.B.2.e below, both trains of the Control Room High trains of the Control Room High Efficiency Air Filtration System Efficiency Air Filtration System used for the processing of inlet air used for the processing of inlet air to the control room under accident to the control room under accident conditions shall be operable when conditions shall be operable when in the Run, Startup, and Hot in the Run, Startup, and Hot Shutdown MODES, during Shutdown MODES, during movement of irradiated fuel movement of recently irradiated assemblies in the secondary fuel assemblies in the secondary containment, and during movement containment, and durng novrement of new fuel over the spent fuel of ncw fue! ever-the 6pent fuelcpe, pool, and during CORE and durag _ORE ATE1RATAIOin, ALTERATIONS, and during and during operations with a operations with a potential for potential for draining the reactor draining the reactor vessel vessel (OPDRVs),

(OPDRVs),

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(ii) TS 3/4.7.B.2.c is revised as follows:

Current TS I ProDosed TS

c. From and after the date that one c. From and after the date that one train of the Control Room High train of the Control Room High Efficiency Air Filtration System is Efficiency Air Filtration System is made or found to be inoperable for made or found to be inoperable for any reason, reactor operation, any reason, reactor operation, irradiated fuel handling, or new fuel irradiated fuel handling, or new fuel handling over the spent fuel pool is hand~ling oxvor the spent fuel c1p is permissible only during the permissible only during the succeeding 7 days providing that succeeding 7 days providing that within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> all active within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> all active components of the other CRHEAF components of the other CRHEAF train are verified to be operable and train are verified to be operable and the diesel generator associated the diesel generator associated with the operable train is operable. with the operable train is operable.

If the system is not made fully If the system is not made fully operable within 7 days, reactor operable within 7 days, reactor shutdown shall be initiated and the shutdown shall be initiated and the reactor shall be in cold shutdown reactor shall be in cold shutdown within the next 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> and fuel within the next 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> and fue/

handling operations shall be hand&n v pldatiava 6hall be terminated within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. Fuel terminated within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. Fuel handling operations in progress handling operatione in progrccs may be completed. may be GomgIeterd.

Notes:

The consequences analysis for the postulated FHA has shown that CRHEAFS is not required for the handling of fuel assemblies that are not recently irradiated.

The requirements of 3/4.7.B.2.e (CRHEAFS) have been expanded to include handling of recently irradiated fuel assemblies whether or not the plant is operating at the time.

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(iii) TS 3/4.7.B.2.e is revised as follows:

Current TS Proposed TS

e. From and after the date that one e. From and after the date that one train of the Control Room High train of the Control Room High Efficiency Air Filtration System is Efficiency Air Filtration System is made or found to be inoperable for made or found to be inoperable for any reason during Refuel Outages, any reason du&rg Refuel Outages, refueling operations are refueling operations, movement of permissible only during the recently irradiated fuel assembles succeeding 7 days providing that and operations with a potential for within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> all active draining the reactor vessel components of the other train are (OPDRVs) are permissible only verified to be operable and the during the succeeding 7 days diesel generator associated with providing that within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> all the operable train is operable. active components of the other train are verified to be operable and the If the system is not made fully diesel generator associated with operable within 7 days, the operable train is operable.

i) perform surveillance If the system is not made fully 4.7.B.2.b.4 for the operable operable within 7 days, CRHEAF every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or i) perform surveillance 4.7.B.2.b.4 for the operable CRHEAF every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

ii) suspend movement of irradiated fuel assemblies in OR secondary containment or new fuel handling over the ii) suspend movement of recently spent fuel pool or core.

irradiated fuel assemblies in secondary containment and Any fuel assembly movement in progress may be completed. initiate actions to suspend OPDR Vscrnrit fuel han over the 6pentful pool or oere. Any fuel assembly movement in progress may be completed.

Notes:

The insertion of operability requirements for OPDRVs is consistent with License Amendment 166 and 170 and is added to ensure actions are clear. The consequences analysis for the postulated FHA has shown that CRHEAFS is not required for the handling of fuel assemblies that are not recently irradiated.

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d. TS 3/4.7.C.1 and ;2 are revised as follows:

Current TS 4 Proposed TS

1. Secondary containment shall be 1. Secondary containment shall be OPERABLE when in the Run, OPERABLE when in the Run, Startup Startup and Hot Shutdown MODES, and Hot Shutdown MODES, during during movement of irradiated fuel movement of recently irradiated fuel assemblies in the secondary assemblies in the secondary containment, and during movement containment, dringnrnornt Move AS of new fuel over the spent fuel pool, new fuel over the spent fucipo6!, and and during CORE ALTERATIONS- 4urg CORE AL TERATI1N and and during operations with a during operations with a potential for potential for draining the reactor draining the reactor vessel (OPDRVs).

vessel (OPDRVs).

2. a. With Secondary Containment 2. a. With Secondary Containment inoperable when in the Run, inoperable when in the Run, Startup and Hot Shutdown Startup and Hot Shutdown MODES, restore Secondary MODES, restore Secondary Containment to OPERABLE Containment to OPERABLE status status within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

b. Required Action and Completion b. Required Action and Completion Time of 2.a not met, be in HOT Time of 2.a not met, be in HOT Shutdown in 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> AND Cold Shutdown in 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> AND Cold Shutdown within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. Shutdown within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

c. With Secondary Containment c. With Secondary Containment inoperable during movement of inoperable during movement of irradiated fuel assemblies in the recently irradiated fuel assemblies, secondary containment, and and during mnovement ef new fue:

during movement of new fuel pRevr-lIor *h,, ero t fel the sent pot, a a'olrve o

over the spent fuel pool, and during COGREALTEF4ATIONS, and during CORE ALTERATIONS, during OPDRVs, immediately:

and during OPDRVs, immediately 1. Suspend movement of recently

1. Suspend movement of irradiated fuel assemblies in irradiated fuel assemblies in the secondary containment.

the secondary containment. AND AND 2. Suspend movement of new fuol

2. Suspend movement of new fuel Ovr ther' pt ftueolpoll.

over the spent fuel pool. AND AND Q C l

~. m^s rrrp rtn s n

ff DAI Al l TlrD A l-I-A

-,r I^ra 5 s la le'

3. Suspend CORE ALTERATIONS AND AND

4. Initiate action to suspend A 2. Initiate actions to suspend OPDRVs.

OPDRVs.

Notes:

The consequences analysis for the FHA has shown that SGTS, CRHEAFS, and secondary containment operability are not required for the handling of fuel assemblies that are not recently irradiated.

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e. TS Bases Chanaes for B3/4.7.B.1 and .2, and B3/4.7.C (naaes B3/4.7-10.12, and 13)

The Bases for SGTS are revised to include a description of 'recently' irradiated fuel assembles. The Bases for SGTS, CRHEAFS, and Secondary Containment are revised describing the revised operability requirements for movement of fuel assemblies that are not recently irradiated based upon proposed TS changes.

These revised pages are attached for information only. Entergy will revise and issue these Bases pages as part of implementation of the approved license amendment.

Attachments 4 and 5 provide marked-up pages and re-typed pages of TS and TS Bases.

Attachment 6 provides a summary of commitments.

3.0 BACKGROUND

AND BASIS FOR PROPOSED TS CHANGE The NRC issued a new regulation, 10 CFR 50.67, in December 1999, which provides a means for power reactor licensees to replace their existing accident source term with an alternate source term (AST). Regulatory Guide 1.183 (Reference 2) provides guidance forthe implementation of ASTs. Regulation 10 CFR 50.67 requires licensees seeking to use ASTs to apply for a license amendment and include an evaluation of the consequences of the affected design-basis accidents. This application addresses these requirements by proposing limited scope application of the AST described in R.G. 1.183 in evaluating the radiological consequences of an FHA. As part of the implementation of the AST, the total effective dose equivalent (TEDE) acceptance criterion of 10 CFR 50.67(b)(2) replaces the previous whole body and thyroid dose guidelines of 10 CFR 100.11 and 10 CFR 50 Appendix A GDC-1 9.

4.0 TECHNICAL ANALYSIS

4.1 Altemate Source Term Entergy has completed two new calculations (for 24 and 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> decay times) evaluating the potential dose consequences of the fuel handling accident. A copy of both of these calculations is included with the application package. These calculations use the AST guidelines outlined in NUREG-1465 (Reference 1), Regulatory Guide 1.183 (Reference 2) and Regulatory Guide 1.194 (Reference 18). These calculations demonstrate that radiological doses at the exclusion area boundary (EAB), low population zone (LPZ) and in the control room (CR) are within allowable limits without crediting secondary containment operability, control room high efficiency air filtration or standby gas treatment systems, after a 48-hour fuel decay period following reactor shutdown.

4.2 Atmospheric Dispersion (X/Q)

Atmospheric dispersion factors (X/Q's) at the normal (primary) control room air intake were calculated using the ARCON96 (Atmospheric Relative CONcentrations in Building Wakes, Reference 17) computer code in accordance with R.G. 1.194 (Reference 18).

Primary assumptions used in the analysis (Reference 5) for two release locations are summarized as follows:

Reactor Building Vent Release Point

• The reactor building vent was evaluated as a ground-level release.

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• 5 years (1996 - 2000) of Pilgrim-specific meteorological data was used.

• The reactor building truck airlock doors were assumed to be closed. These doors are normally closed (except for passage of authorized personnel), and are arranged in an "air lock" configuration that allows passage by opening only one door at a time.

Reactor Building Truck Airlock Door Release Point

• The reactor building truck airlock door was evaluated as a ground-level release.

• 5 years (1996 - 2000) of Pilgrim-specific meteorological data was used.

• Both reactor building truck airlock doors were assumed to be open.

Table 2 summarizes the results of the calculation (Reference 5 is attached).

TABLE 2 - Atmospheric Dispersion Factors (X/Q's) for Control Room X/Q (s/m3) (from Reference 5)

Time Interval (hrs.) Reactor Building Reactor Building Truck Vent Release point Airlock Door Release Point 0 -2 1.85E-03 9.87E-04 2-8 1.45E-03 7.39E-04 8 - 24 5.19E-04 2.71 E-04 24 - 96 4.21 E-04 1.86E-04 96 - 720 3.81 E-04 1.58E-04 As noted in the introduction of R.G. 1.194, many of the positions in the guide represent significant changes. ARCON96 implements an improved building wake dispersion algorithm; assessments of ground level, building vent, elevated and diffuse-source release models; use of hour-by-hour meteorological observations; sector averaging; and directional dependence of dispersion conditions. Therefore, no discussion of the comparison with current licensing basis X/Q values is presented.

4.3 Radiological Consequences of a Design-Basis Fuel Handling Accident The radiological consequences of a design-basis FHA were analyzed using Pilgrim-specific design inputs and assumptions. Evaluations were performed both with and without the ESF functions after 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> of reactor fuel decay. The calculations assumed that the main control room ventilation remained in its normal (non-emergency) mode.

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Similarly, the SGTS was assumed not to be operating. Plant-specific design inputs were validated (See NEI 99-03, Reference 8) to ensure that they are representative of "as-built' plant design conditions.

Primary assumptions used in this analysis are summarized below:

• Alternate source terms used

• No credit taken for ESF systems (secondary containment operability, standby gas treatment system filtration or operation of the control room high efficiency air filtration system) in the applicable calculations

• Analyses used guidance in Appendix B of Regulatory Guide 1.183

• Fuel decayed for a period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />

• Release occurred during a 2-hour period

• Credited scrubbing of the halogen activity by water over dropped assembly Table 3 summarizes the key assumptions and design-basis parameters used in the development of the source term. The TEDE doses for the exclusion area boundary (EAB), low population zone (LPZ) and control room (CR) were calculated using the post-FHA release through the reactor-building vent for 0-2 hours using the newly calculated X/Qs (Reference 5). It should be noted that FHA 0-2 hours release commences after a fuel decay period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> following shutdown.

Appendix B of RG 1.183 Appendix B of Regulatory Guide 1.183 (Reference 2) outlines six groups of assumptions acceptable to the NRC staff for evaluating the radiological consequences of a design-basis fuel handling accident. The following sections will discuss these assumptions as they relate to the new analyses.

• Source Term The fractions of core inventory assumed to be in the gap for the various nuclides are taken from Table 3 uNon-LOCA Fraction of Fission Product Inventory in Gap' of Regulatory Guide 1.183. These release fractions were then applied to the core fission product inventory, a conservative estimate of 151 damaged fuel rods, and a maximum core radial peaking factor of 2.1, to produce the source term used in the analysis.

• Water Depth A decontamination factor (DF) of 200 was assumed for the scrubbing effects of water on halogen activity released. The DF was based on a minimum of 23 feet of water over the dropped assembly. While the minimum water depth above spent fuel assemblies in the spent fuel pool permitted by TS is less (18 ft), calculations show that as a result of a reduced drop height, an assembly dropped over the spent fuel pool would involve less energy and result in fewer damaged fuel rods. The normal depth of water in the spent fuel pool provides about 23 feet of coverage. Consequently, the radiological consequences of a FHA over the reactor vessel bound the consequences of a FHA over the spent fuel pool even with the reduced scrubbing.

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• Noble Gases A DF of 1 was used because the retention of noble gases in the water in the fuel pool or reactor cavity is negligible. Particulate radionuclides were assumed to be retained by the water in the fuel pool or reactor cavity (i.e., infinite decontamination factor).

• Fuel Handling Accidents within the Fuel Building This section of the regulatory guide is not applicable, as Pilgrim does not have a separate fuel building.

• Fuel Handling Accident within Containment Entergy analyses assumed that the normal reactor building refuel floor ventilation system is functioning and the exhaust dampers are open during fuel handling operations. No credit has been taken for ESF actuation or manual actions to restore secondary containment closure. Radioactive material that escapes from the spent fuel pool, or reactor cavity, is released to the environment over a 2-hour period, following a fuel decay period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> following reactor shutdown.

Credit for dilution or mixing of the activity released from the reactor cavity or spent fuel pool by natural or forced convection inside the containment was not considered.

• Core InventorV The core inventory is based on a thermal power level of 2028 MWt, plus a measurement uncertainty of 0.5%. A radial peaking factor of 2.1 was used instead of 1.5 as recommended in Regulatory Guide 1.183 to provide additional margin for future core reloads and different fuels. The isotopic activities released from the damaged fuel rods are calculated based on the number of rods failed during the FHA and core thermal power level to obtain the Ci/MWt.

• Number of Fuel Rods Damaged The analyses assumed that 151 fuel rods were damaged. Total number of fuel rods in the core was 45512. The type of fuel used was GE Type 14 (10xlO). Refer to GNF report NEDE-31152P (Reference 15) and NEDE-24011-P-A-US-14 (Reference 16) for additional information.

• Timing of Release Phase Gap activity in the damaged rods was assumed to be released instantaneously. The analysis assumed that the release to the atmosphere would occur over a 2-hour period, following a 48-hour fuel decay following reactor shutdown.

RADTRAD Computer Code Dose calculations were performed using the RADTRAD (RADionuclide Transport and Removal and Dose Estimation) computer program, Version 3.02 (Reference 12).

RADTRAD uses a combination of tables and numerical models of source term reduction to determine the time-dependent dose at a specified location. It also provides the inventory, decay chain and dose conversion factors needed for the dose analysis. The RADTRAD code was developed by Sandia National Laboratories (NRC contractor) for the staff to use in estimating fission product transport and removal, and in estimating 18

radiological doses at selected receptors at nuclear power plants. The NRC has reviewed and approved other AST-based TS changes that used this same program.

Control Room Envelope In-leakage Infiltration pathways, other than through the normal CR outside air intake, were not considered in this analysis because the control room ventilation system was assumed to operate in it's "normal" (non-emergency Mode) without taking credit for emergency filtration systems (i.e. CRHEAFS) or the effects of pressurizing or isolating the control room envelope.

4.4 Results of Fuel Handling Accident Dose Consequences The resulting doses at the EAB, LPZ, and CR locations are compared with the regulatory allowable limits in Table 4. Table 5 compares these to current licensing basis (CLB) radiological doses for a refueling accident (or FHA).

CLB doses are from Table 14.5-5 of the Pilgrim UFSAR. Radiological doses to the Technical Support Center (TSC) personnel were calculated separately for the Fuel Handling Accident. A comparison of control room and TSC accident time-dependent atmospheric dispersion factors (XIQ's) (Reference 5) shows that the XIQ's for the control room bound those for the TSC, thus, the exposures for control room personnel bound the doses expected for the TSC.

With the SGTS and CRHEAFS operable, irradiated fuel may be moved 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after reactor shutdown. Without SGTS and CRHEAFS operable, irradiated fuel may be moved 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after reactor shutdown.

The FHA dose consequence analysis considered the reactor building exhaust vent as the release point with normally closed truck airlock doors with no credit for the operability of secondary containment, SGTS, or CRHEAFS. Pilgrim also considered release through the open reactor building truck airlock doors with no credit for the operability of secondary containment, SGTS, or CRHEAFS. The resulting dose consequences are also below the regulatory limits and are bounded by the dose consequences with the reactor building exhaust vent as the release point with normally closed airlock doors.

Thus, the reactor building truck airlock doors can be open during the movement of non-recently irradiated fuel assemblies without adversely impacting the FHA dose consequence analysis.

4.5 Core Alterations The accidents postulated to occur during core alterations, in addition to the fuel handling accident, are inadvertent criticality due to control rod removal error and the inadvertent loading of, and subsequent operation with, a fuel assembly in an improper location.

These events are not postulated to result in fuel cladding integrity damage. Therefore, the only accident postulated to occur during core alterations that result in significant radioactive release is the fuel handling accident. Thus, the consequence of a fuel handling accident envelops the consequences of potential accidents postulated to occur during core alterations. Therefore, the proposed TS changes omitting core alterations are justified.

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4.6 Operations with a Potential for Draining the Reactor Vessel (OPDRVs)

Secondary containment operability is required during OPDRVs, since OPDRV events can be postulated to cause fission product release, different than the fuel handling accident. The revised FHA does not alter the operability requirements for OPDRV conditions. Since secondary containment is the only barrier to the release of fission products into the environment, the SGTS is required to be operable to maintain the secondary containment operability during OPDRVs and if one train of SGTS is not operable during OPDRVs, actions must be initiated. Similarly, CRHEAFS is required to assure control room habitability during OPDRVs and if one train of CRHEAFS is not operable, actions must be initiated. License Amendments 166 and 170 revised the operability requirements of secondary containment, SGTS, and CRHEAFS for startup, run, and hot shutdown modes, during movement of irradiated fuel assemblies and during OPDRVs. Thus, TS 3/4.7.B.1.e (SGTS) and 314.7.B.2.e (CRHEAFS) are revised such that if one train of SGTS and CRHEAFS are not operable during OPDRVs, actions must be initiated to suspend OPDRV events. These revised requirements are more restrictive than the wording of the current Technical Specifications, but are consistent with the License Amendments 166 and 170.

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TABLE 3 - Key Inputs for Fuel Handling Analysis Input/Assumption Value Fuel Type General Electric GE14 Reactor Thermal Power 2038 MWt Initial Mass of Uranium 98.7 metric tons Initial Core Average Enrichment 4.06 - 4.6 w%( 1)

End of Cycle Core Wide Exposure 5 - 58 GWD/MT(')

Number of Failed Rods 151 Radial Peaking Factor 2.1 Total number of fuel rods in core 45512 Fuel Decay Period 24- 120 hrs Release Fractions RG 1.1 83 Table 3 Effective pool iodine decontamination factor 200 Iodine species fractions above water Elemental = 57%

Organic = 43%

Noble Gas decontamination factor 1 Release duration (starting after 48-hour fuel 2 hrs decay Release location:

No secondary containment (No SGTS) Reactor Building With secondary containment (SGTS) Main Stack 1 Range considered in determining bounding source term 21

TABLE 4 - Radiological Dose Effects of Fuel Handling Accident (Reference 4)

Receptor Location Control Room EAB LPZ w/ CRHEAFS wlo CRHEAFS Calculated TEDE Dose (rem) 24-hr decay, w/SGTS 2.2x10 5 2.6x10 5 0.39 0.01 48-hr decay, wo SGTS 2.4 2.9 4.9 0.05 Allowable TEDE Limit (rem) 5.00 6.30 6.30 TABLE 5 - Comparison of Current Licensing Basis (CLB) and Altemate Source Term (AST) Radiological Doses as a result of a Fuel Handling Accident Site Boundary / Low Population Zone CnrlRo Exclusion Area Control Room Boundary CLB AST 2 CLB AST 3 CLB AST 4 (Rem) (Rem) (Rem) (Rem) (Rem) (Rem) 24 4.9 2.4 0.05 X5 2.9 Thyroid' TEDE Thyroid' TEDE TEDE Notes

1. From Pilgrim UFSAR Table 14.5-5

2. 48-hr decay with no SGTS

3. 48-hr decay with no SGTS

4. 48-hr decay with no SGTS and no CHRAFS

5. FHA dose impact on control room not reported in UFSAR 22

5.0 REGULATORY SAFETY ANALYSIS 5.1 No Significant Hazards Consideration Entergy Nuclear Operations, Inc. (Entergy) proposes changes to the (a) Pilgrim licensing basis of the Fuel Handling Accident (FHA) as described in the Pilgrim updated Final Safety Analysis Report (UFSAR) and (b) Pilgrim Technical Specifications (TS). The proposed changes to the TS would eliminate secondary containment operability requirements when handling sufficiently decayed irradiated fuel and performing core alterations, and clarify requirements associated with operations with potential to drain the reactor vessel (OPDRVs). These changes revise secondary containment isolation requirements, and standby gas treatment system (SGTS), control room high efficiency air filtration system (CRHEAFS), and secondary containment operability requirements for refueling operations.

Entergy has evaluated whether or not a significant hazards consideration is involved with the proposed changes by focusing on the three standards set forth in 10 CFR 50.92, Issuance of amendment," as discussed below:

1. Does not involve a significant increase in the probability or consequences of an accident previously analyzed?

Response: No.

The proposed changes do not modify the design or operation of equipment used to move spent fuel or to perform core alterations. The proposed changes cannot increase the probability of any previously analyzed accident because they are based on changes in Source Term, atmospheric dispersion and dose consequence analysis methodology, not in procedures or equipment used for fuel handling.

The conservative re-analysis of the fuel handling accident (FHA) concludes that the radiological consequences are within the regulatory limits established 10 CFR 50.67.

This conclusion is based on the Alternate Source Term and guidance provided in Appendix B of Regulatory Guide 1.183 and analyses of fission product release and transport path that does not take credit for dose mitigation provided by engineered safeguards including secondary containment, standby gas treatment system (SGTS),

and control room high efficiency air filtration system (CRHEAFS). The results of the core alteration events, other than the fuel handling accident, remain unchanged from the original design-basis that showed these events do not result in fuel cladding damage or radioactive release. Since secondary containment is the only barrier to the release of fission products into the environment, the SGTS is required to be operable to maintain the secondary containment operability during OPDRVs and if one train of SGTS is not operable during OPDRVs, actions must be initiated. Similarly, CRHEAFS is required to assure control room habitability during OPDRVs and if one train of CRHEAFS is not operable, actions must be initiated. License Amendments 166 and 170 revised the operability requirements of secondary containment, SGTS, and CRHEAFS for startup, run, and hot shutdown modes, during movement of irradiated fuel assemblies and during OPDRVs. TS 3/4.7.B.1.e (SGTS) and 3/4.7.B.2.e (CRHEAFS) are revised such that if one train of SGTS and CRHEAFS are not operable during OPDRVs, actions must be initiated to suspend OPDRV events. These revised requirements are more restrictive than the wording of the current Technical Specifications, but are consistent with the License Amendments 166 and 170.

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Therefore, the proposed changes do not involve a significant increase in the probability of occurrence or consequences of an accident previously analyzed.

2. Does not create the possibility of a new or different kind of accident from any accident previously analyzed?

Response: No The proposed changes do not introduce any new modes of plant operation and do not involve physical modifications to the plant.

Therefore, the proposed changes do not create the possibility of a new or different kind of accident from any previously analyzed.

3. Does not involve a significant reduction in the margin of safety?

Response: No Regulation 10 CFR 50.67 permits licensees to voluntarily revise the accident source term used in design-basis radiological consequence analyses. This license amendment application evaluates the consequences of a design-basis fuel handling accident in accordance with this regulation and R.G. 1.183. The revised analysis concludes that the radiological consequences of the fuel handling accident are less than the regulatory allowable limits. Safety margins and analytical conservatisms are retained to ensure the analysis adequately bounds all postulated event scenarios. The selected assumptions and release models provide an appropriate and prudent safety margin against unpredicted events in the course of an accident and compensates for large uncertainties in facility parameters, accident progression, radioactive material transport and atmospheric dispersion. The proposed TS applicability statements continue to ensure that the TEDE at the boundaries of the control room, the exclusion area, and low population zone boundaries are below the corresponding regulatory allowable limits in 10 CFR 50.67(b)(2). The proposed operability requirements for SGTS and CRHEAFS during OPDRVs are consistent with the License Amendments 166 and 170 and therefore do not reduce the margin of safety.

Therefore, the changes do not involve a significant reduction in margin of safety.

Based on the above, Entergy concludes that the proposed changes present no significant hazards consideration under the standards set forth in 10 CFR 50.92(c) and accordingly, a finding of "no significant hazards consideration" is justified.

5.2 Applicable Regulatory Requirements/Criteria This section describes how the proposed changes and Entergy's technical analyses satisfy applicable regulatory requirements and acceptance criteria.

10 CFR 50 Appendix A General Design Criterion 61, "Fuel Storage and Handlinq and Radiological Control" The general design criteria (GDC) in place today became effective after the Pilgrim construction permit was issued. A September 18, 1992 memorandum to the NRC Executive Director of Operations from the Secretary of the NRC summarized the results of a Commissioners vote in which the Commissioners 24

instructed the NRC staff not to apply the GDC to plants with construction permits issued prior to May 21, 1971. Pilgrim's construction permit was issued on August 26,1968.

Pilgrim's design and licensing basis for fuel storage and handling and radiological controls is detailed in the updated Final Safety Analysis Report (UFSAR) and other plant-specific licensing basis documents. UFSAR Appendix F provides a comparison of Pilgrim Station with the proposed GDC published by the AEC for public comment in the Federal Register dated July 11, 1967.

10 CFR 50.67 "Accident Source Term" Regulation 10 CFR 50.67 permits licensees to voluntarily revise the accident source term used in design-basis radiological consequence analyses. This document is part of a 10 CFR 50.90 license amendment application and evaluates the consequences of a design-basis fuel handling accident previously reported in the safety analysis report.

10 CFR 50.65 "Requirements for monitoring the effectiveness of maintenance at nuclear power plants" Regulation 10 CFR 50.65(a)(4) requires licensees to assess and manage changes in risk that result from taking risk-significant systems out-of-service or during certain maintenance activities. The NRC staff, in Regulatory Guide 1.182 (Reference 19), states that the methods detailed in Section 11 of NUMARC 93-01 (Reference 13) are acceptable for complying with the requirements of 10 CFR 50.65(a)(4). Section 11.3.6.5 "Containment - Primary (PWR)/Secondary (BWR)," of NUMARC 93-01 states:

Maintenance activities involving the need for open containment should include evaluation of the capability to achieve containment closure in sufficient time to mitigate potential fission product release. This time is dependent on a number of factors including the decay heat level and the amount of RCS inventory available.

For BWRs, Technical Specifications may require secondary containment to be closed under certain conditions such as during fuel handling and operations with a potential to drain the vessel.

In addition to the guidance in NUMARC 91-06, for plants which obtain license amendments to utilize shutdown safety administrative controls in lieu of Technical Specification requirements on primary or secondary containment operability and ventilation system operability during fuel handling or core alterations, the following guidelines should be included in the assessment of systems removed from service:

• During fuel handling/core alterations, ventilation system and radiation monitor availability (as defined in NUMARC 91-06) should be assessed, with respect to filtration and monitoring of releases from the fuel. Following shutdown, radioactivity in the RCS decays fairly rapidly. The basis of the TS operability is the reduction in doses due to such decay. The goal of maintaining ventilation system and radiation monitor availability is to reduce dose even further below that provided by the natural decay, and to avoid unmonitored releases.

25

• A single normal or contingency method to promptly close primary or secondary containment penetrations should be developed. Such prompt methods need not completely block the penetration or be capable of resisting pressure. The purpose is to enable ventilation systems to draw the release from a postulated fuel handling accident in the proper direction such that it can be treated and monitored.

To further limit the potential radiological consequences of a fuel handling accident at Pilgrim, Entergy will revise the Pilgrim guidelines for assessing systems removed from service during the handling of recently irradiated fuel assemblies or core alterations to implement the provisions of Section 11.3.6.5 of NUMARC 93-01, "Industry Guideline for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants," Revision 3 (Reference 13). These guidelines will address the capabilities to promptly close secondary containment and will be completed prior to the implementation of this license amendment. (This commitment is also consistent with the NRC-approved generic TS change, TSTF-51 (Reference 20) regarding usage of the term "recently irradiated fuel assemblies.")

10 CFR 100. Paragraph 11, "Determination of Exclusion Area. Low Population Zone and Population Center Distance" This paragraph provides criteria for evaluating the radiological aspects of reactor sites. A footnote to 10 CFR 100.11 states that the fission product release assumed in these evaluations should be based on a major accident involving substantial meltdown of the core with subsequent release of appreciable quantities of fission products. A similar footnote appears in 10 CFR 50.67.

In accordance with the provisions of 10 CFR 50.67(a), the radiation dose reference values in 10 CFR 50.67(b)(2) were used in these analyses in lieu of those prescribed in 10 CFR 100. (Refer to footnote 5 on page 1.183-7 of Regulatory Guide 1.183, dated July 2000.)

Regulatory Guide 1.25, "Assumptions Used for Evaluatinq the Potential Radiological Consequences of a Fuel Handling Accident in the Fuel Handling and Storaae Facility for Boiling and Pressurized Water Reactors". March 1972 Regulatory Guide 1.25 is not applicable to the application. Regulatory Guide 1.183 supersedes corresponding radiological assumptions provided in other regulatory guides and standard review plan chapters when used in conjunction with an approved alternate source term and the TEDE criteria provided in 10 CFR 50.67.

Regulatorv Guide 1.183, "Alternative Radiological Source Terms for evaluating Design Basis Accidents at Nuclear Power Reactors", July 2000 Regulatory Guide 1.183 outlines acceptable applications of ASTs, the scope, nature and documentation of associated analyses and evaluations, consideration of impacts on analyzed risk; and content of submittals. It also establishes acceptable ASTs and identifies the attributes of ASTs acceptable to the NRC staff. This guide also identifies acceptable radiological analysis assumptions for use in conjunction with the AST.

26

Entergy used this regulatory guide extensively in the preparation of this "limited scope implementation" evaluation, the supported application and the supporting analyses. This application and the supporting analyses comply with this guidance to the extent practical.

NUREG-1465, "Accident Source Terms for Light-Water Nuclear Power Plants" NUREG-1465 (Reference 1) provides more realistic estimates than TID-14844 (Reference 14) of "source term" releases into containment in terms of timing, nuclide types, quantities, and chemical form, given a severe core melt.

NUREG-1465 provides much of the technical basis for the regulatory positions in Regulatory Guide 1.183.

NUREG-0800. Standard Review Plan. Section 15.7.4. "Radiological Consequences of Fuel Handling Accidents" This SRP section covers the review of the radiological effects of a postulated fuel handling accident. Revision 1 does not reflect the guidance in Regulatory Guide 1.183 or the promulgation of 10 CFR 50.67.

5.3 Conclusion The results of these analyses indicate that the dose at the exclusion area boundary (EAB) would be no more than 4.9 rem total effective dose equivalent (TEDE) and the dose at the low-population zone (LPZ) would be no more than 0.05 rem TEDE. These results are less than the TEDE criteria of 6.3 rem set forth in Regulatory Guide 1.183 and are a small fraction of the dose criteria in 10 CFR 50.67(b)(2)(i) and (ii). The analyses also show that control room operators would receive no more than 2.9 rem TEDE.

These doses are less than the TEDE limit of 5 rem contained in 10 CFR 50.67(b)(2)(iii) and GDC-1 9, "Control Room."

In conclusion, based on the considerations discussed above, (1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.

The NRC has approved similar TS changes (References 3 and 22).

6.0 ENVIRONMENTAL CONSIDERATION

Entergy has determined that the proposed amendment would change a requirement with respect to installation or use of a facility component located within the restricted area, as defined in 10 CFR 20, or would change an inspection or surveillance requirement.

However, the proposed amendment does not involve (i) a significant hazards consideration, (ii) a significant change in the types or significant increase in the amounts of any effluent that may be released offsite, or (iii) a significant increase in individual or cumulative occupational radiation exposure.

27

Accordingly, the proposed amendment meets the eligibility criterion for categorical exclusion set forth in 10 CFR 51 .22(c)(9). Therefore, pursuant to 10 CFR 51.22(b), no environmental impact statement or environmental assessment need be prepared in connection with the proposed amendment.

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7.0 REFERENCES

1. NUREG-1465, "Accident Source Terms for Light-Water Nuclear Power Plants," L.

Soffer et al., February 1995.

2. Regulatory Guide 1.183, "Alternative Radiological Source Terms for Evaluating Design Basis Accident at Nuclear Power Reactors," July 2000.

3. NRC letter, D. S. Hood to G. Van Middlesworth, dated April 16, 2001 regarding

'Duane Arnold Energy Center - Issuance of Amendment Regarding Secondary Containment Operability During Movement of Irradiated Fuel and Core Alterations (TAC No. MB1569)."

4. Entergy Calculation No. PNPS-1-ERHS-XXII.A-2, "Radiological Consequences of a Design Basis Fuel Handling Accident using the Alternate Source Term", Rev. 1.

5. Entergy Calculation No. PNPS-1-ERHS-II.B-4, "Control Room and Technical Support Center Accident X/Qs Using ARCON96", Rev. 1.

6. 10 CFR 50.67, "Accident Source Term"

7. Regulatory Guide 1.49, Rev. 1, "Power Levels for Nuclear Power Plants."

8. NEI 99-03, "Control Room Habitability Guidance."

9. GE Technical Report NEDO-20360, "Licensing Topical Report, General Electric Boiling Water Reactor, Generic Reload Application for 8x8 Fuel", Rev. 1, November 1974.

10. Global Nuclear Fuel, NEDE-31152P, Revision 8, Class IlIl, April 2001, "General Electric Fuel Bundle Designs."

11. Regulatory Guide 1.25, "Assumptions Used For Evaluating The Potential Radiological Consequences Of A Fuel Handling Accident In The Fuel Handling and Storage Facility For Boiling and Pressurized Water Reactors," dated March 23, 1972.

12. S. L. Humphreys et al., "RADTRAD: A Simplified Model for Radionuclide Transport and Removal and Dose Estimation," NUREG/CR-6604, USNRC, April 1998.

13. NUMARC 93-01, "Industry Guideline for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants," Revision 3.

14. J. J. DiNunno et. al., "Calculation of Distance Factors for Power and Test Reactor Sites," USAEC TID-1 4844, U. S. Atomic Energy Commission (now USNRC), 1962.

15. Global Nuclear Fuel, NEDE-31152P, Revision 8, Class l1l, April 2001, "General Electric Fuel Bundle Designs."

16. General Electric, NEDE-24011-P-A--US-14, "General Electric Standard Application for Reactor Fuel (Supplement for United States)."

17. ARCON96 computer code described in NUREG/CR-6331, "Atmospheric Relative Concentrations in Building Wakes," Revision 1, May 1997.

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18. Regulatory Guide 1.194, "Atmospheric Relative Concentrations for Control Room Radiological Habitability Assessments at Nuclear Power Plants", June 2003.

19. Regulatory Guide 1.182, "Assessing and Managing Risk before Maintenance Activities at Nuclear Power Plants."

20. TSTF-51, Rev. 2, "Revise Containment Requirements During Handling Irradiated Fuel and Core Alterations," Excel Services Corporation.

21. 10 CFR 100.11 Determination of exclusion area, low population zone and population center distance."

22. NRC letter, G. S. Vissing to M. Kansler, dated September 12, 2002 regarding "James A FitzPatrick Nuclear Power Plant - Amendment Re: Technical Specification Change to the Requirements for Handling Irradiated Fuel Assemblies (TAC No. MB5328)."

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