ML20065U275

Operating Reactor - TMI Lessons Learned NUREG-0737 Response Evaluations (Program Ii),Project 1 - RCS Vents (Item II.B.1) for Cooper Nuclear Station, Final Technical Evaluation Rept

ML20065U275
Person / Time
Site:	Cooper
Issue date:	07/01/1982
From:	Barnhart B, Butcher E LAWRENCE LIVERMORE NATIONAL LABORATORY
To:	Office of Nuclear Reactor Regulation
Shared Package
ML20065U273	List: ML20065U275
References
CON-FIN-A-0246-02, CON-FIN-A-246-2, RTR-NUREG-0737, RTR-NUREG-737, TASK-2.B.1, TASK-TM NUDOCS 8211040112
Download: ML20065U275 (4)

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g LAWRENCE UVERMORE LABORATORY N

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Operating Reactors - TMI Lessons Learned NUREG-0737 Response. . l Evaluations (Program II)'

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i Project 1 - Reactor CDolant System Vents (Item II.B.1) '

NRC FIN A0246-2 a

FINAL TECHNICAL EVALUATION REPORT FOR COOPER Prepared by Energy Incorporated - Seattle for Lawrence Livemore National Laboratory under contract to the NRC Office of Nuclear Reactor RegJlation,- Division of Licensing.

DL Cognizant Manager - Ed Butcher DL Project Manager - Beverly Barnhart i

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it July 1, 1982 ,e 8211040112 821014 PDR ADOCK 05000298 P PDR ,

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Docket Number 50-298 NRC TAC Number 44362

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TECH 41 CAL EVALUATION REPORT ON REACTOR COOLANT SYSTEM VENTS FOR COOPER .

. e INTRODUCTION h

The requirements for Reactor Coolant System High Point i Light Vents (C)(3)(iii) of 10 CFR 50.44, " Standards for' Combustible(SRP) Gos Co Water Cooled Power Reactors," and are further described NUREG- in S Section 5.4.12, " Reactor Coolant System High Point Vents 0737, "Clorification of TMI Action Plan Requirements." b itted information in previous requirements, the Nebraska Public Power District has su m References I through 3 in support of the vent system on Coope EVALUATION ible d

The function of the reactor coolant system (RCS) li ven.tnaturoi during system gases from the high points of the RCS to assure that core coo n circulation will not be inhibited. The Boiling Water Reactor RCS venting requ submitted documentation (References 4 through 7) on how th l

l ore met in General Electric (GE) BWRs.

endorsed by the licensee.

f f venting In occordonce with the BWR Owners' Group position, the prima noncondensible gases from the reactor pressure / li f vessellves atwhich Cooper aloneore safety-grade automatic depressurization system (ADS) safety re e provide adequate venting.

b ystem We have reviewed design information on the l f volves the mainossocia control that will serve os RCS vents and confirmed that they are operab e room. We have also determined that the volves i are provided witd that a degree of redundoney in the RCS vent system is provNRC vent poths from different emergency buses.

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I safety / relief volves are provided with positive position indication in the main control room (Reference 8). Additional RCS venting occurs of the high pressure coolont injection (HPCI) and reactor core isolation cooling (RCIC) system turbine exhausts. No other protection system that is necessary to maintain odequate core cooling requires remote venting since none are susceptible to the buildup of a large. omount of noncondensible gas that could cause o loss of function of these systems.

CONCLUSION We conclude, based on the applicobility of the BWR Owners' Group position to Cooper and our specific review of the Cooper design, that the existing systems at Cooper are ,

sufficient to effectively vent noncondensible gases from the RCS and meet the requirements of NUREG-0737 Item li.B.I and paragraph (c)(3)(iii) of 10 CFR 50.44. We therefore recommend that the Cooper RCS venting capability be found occeptable by NRC with the following confirmatory items. NRC must review and approve the existing operating procedures and technical specifications for use of the existing systems as RCS ,

vents.

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f *'Y REFERENCES e

1. Letter, J.M. Pilant (Nebraska Public Power District) to D.G. Eisenhut (NRC),'"Three Mile Island Followup Actions," dated October 17, 1979.

, 2. Letter, J.M. Pilant (Nebraska Public Power District) to D.C. Eisenhut (NRC), " Post TMI-Requirements /NUREG-0737," dated June 30,1981.

s l 3. Letter, J.M. Pilant (Nebraska Public Power District) to D.B. Vassallo (NRC), all.B.I

'RCS High Point Vents' Response to NRC Request," dated April 30,1982.

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4. Letter, T.D. Keenan (BWR Owners' Group) to D.G. Eisenhut (NRC), "BWR Owners' Group Positions on NUREG-0578," dated October 17, 1979.

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f S. Letter, D.B. Waters (BWR Owners' Group) to NRC (Attn: D.G. Eisenhut),

" Preliminary Clarification of TMI Action Plan Requirements - BWR Owners' Group Comments," dated October 8,1980. , ,

6. General Electric Report NEDO-24708A, Revision I, "A'dditional Information Required. for NRC Staff Generic Report on Boiling Water Reactors," dated December 1980.

{ 7. Letter, D.B. Waters (BWR Owners' Group) to NRC (Attn: D.G. Eisenhut),

"NUREG-0660/0737 Requirement II.B.1: Reactor Coolant System Vents," dated j April 24,1981.

8. NUREG-0737, " Clarification of TMI Action Plan Requirements," item ll.D.3, " Direct Indication of Relief- and Safety- Valve Position," dated November 1980.

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