ML18191A287

Wppss Nuclear Project No. 2. BWR Mark II Containment Additional Design Information

ML18191A287
Person / Time
Site:	Columbia
Issue date:	06/05/1975
From:	Stein J Washington Public Power Supply System
To:	Butler W Office of Nuclear Reactor Regulation
References
G02-75-163
Download: ML18191A287 (8)

Text

fdRC DISTRIBUTION FOR PART 50 DOCKET MATERIAL (TEMPORARY FORM)

CONTROL NO: IP Z FILE FROM. Was ington Public Pwr DATE OF DOC DATE REC'D LTR 'WX RPT OTHER Richland, Wash JJ Stein' 6<<5-'75 6 ORIG CC OTHER SF-NT 1BC PDR XX TO: Butler DR one signed SENT LOCAL PDR CLASS UNCLASS PROPINFO INPUT NO CYS REC'D DOCKET NO:

XXXXXXXXX 1 50-397 DESCRIPTION: ENC LOSUR ES:.

Ltr re their 5-8-75 ltr....furnishing addi info with regard to a schedule BONOT REMOVE for submission of lmaterial dealing with Mark II containment design info ZCKWOWLEDGED PLANT NAME: WPPS 82 FOR ACTION/INFORMATION 6-10-75 . ehf f LER (L) SCHWENCER (L) Zl EMANN (L) REGAN (E)

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REGULATORY DOCKET FILE COPY Washington Public Power Supply System A JOINT OPERATING AGENCY P. 0. BOX 968 3000 GEO WASHINGTON WAY RICHI.ANDWASHINGTON 99252 PHONE (509) 946.968l Docket No. 50-397 June 5, 1975 G02-75-163 Dr. W.R. Butler, Chief BWR-Projects Branch No. 1-2 ~f/pp YLL Directorate of Licensing U.S. Nuclear Regulatory Commission Washington, D.C. 20545

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Subject:

WPPSS NUCLEAR PROJECT NO. 2 BWR MARK II CONTAINMENT ADDITIONAL DESIGN INFORMATION I

References:

1) Letter, W.R. Butler to J.J. Stein, Oz Suppression pool hydrodynamic loads 90CKETED QSEERC during LOCA, dated April 17, 1975,,

2) Letter, W.R. Butler to J.J. Stein, Pool dynamic loads due to relief valve operation, dated April 23, 1975 JUN P "97~

HIIClEAR REGWAT0 02T CnH ~ c> IO I

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3) Letter, J.J. Stein to W.R. Butler, IIIoll SoHlo BWR Mark II Containment Additional Design Information, dated May 8, 1975 .

Dear Dr. Butler:

This letter provides a schedule for the information requested by refer-ences 1 and 2 as promised by our reference 3. The attachment to this letter provides a schedule and program for resolving your concerns with the Boiling Water Reactor Mark II containment concept. The schedule calls for the submittal of containment present-design data in July 1975 and continues through the first quarter of 1976, with the schedule for final assessment of'containment. We believe for to submit it would be inappropriate us a gross assessment of the highly geometry-related phe-nomena identified in other containment configurations for the WPPSS Nuclear Project No. 2 containment design at this time'.

In the event the results of the program reveal a change or modification to the WPPSS Nuclear Project No. 2 Mark II containment is necessary, we

-will inform you. The WPPSS Nuclear Project No. 2 containment is essen-tially 100Ã complete and the construction pressure test required by'he f

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~or. W. R. Butler Page 2 June 5, 1975 G02-.75-163

~, ACME Code is being conducted. it If becomes established that a modifi-cation to the containment vessel is required, we have determined, through contact with our authorized inspection agency (Factory Mutual Engineering),

that certain modifications could be accommodated in this ASME Section III containment vessel. Such modifications would be made in accordance with the ASME Section XI requirements. We therefore do not feel that we are precluding the ability to accommodate modifications to the containment vessel if these become necessary in the future.

Very truly yours,

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J. J. STEIN Managing Director JJS:CLF:vlm Attachment cc: DJ Anderson - Bonneville Power Administration JJ Byrnes - Burns and Roe, Inc, FA MacLean - General Electric Company JJ Verderber - Burns and Roe, Inc,

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ATTACHMENT "A" MARK II SCHEDULE 8( PROGRAM LOCA SRV

~Pro ram Schedule guestions questions Submit plant unique suppression pool and July, 1975 ] 5*

relief valve drawings reflecting current design.

2. Submit a generic "Preliminary Forcing Sept., 1975 7* 1*,2,4*,6 Function Report" which will provide the time history of pool dynamic forcing functions and the methods for relating these functions to the containment structures and components.

3. Submit a description of a suppression pool Oct., 1975 Not. Appl . 7,8,9,10 temperature monitoring system. (Temperature limits and transients will be described in the Final Safety Analysis Report).

4. Submit a plant unique preliminary assess- Nov., 1975 3,4,5,6,7*,8 3,4*,5 ment of containment structures and compo-nents based on the Preliminary Forcing Function Report.

5. Submit a schedule for the generic test Dec., 1975 program and mathematical models which justify the forcing functions used to assess containment structures and components.

6 ~ Submit a schedule for the final assess- First quarter ment of containment structures and 1976 components.

• Partial Answer

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