ML13308A088

Requests That NRR Draft Supplemental Safety Evaluation Addressing ACRS Concerns Re Sys 80 Design (CESSAR) Be Reviewed & That Analysis of Need for Power Operated Relief Valves in Sys Design Be Provided

ML13308A088
Person / Time
Site:	Palo Verde, San Onofre, 05000000, 05000470
Issue date:	02/08/1982
From:	Eisenhut D Office of Nuclear Reactor Regulation
To:	Scherer A Combustion Engineering
Shared Package
ML13308A086	List: ML13308A085 ML13308A087 ML13308A088 NUREG/CR-2497, Forwards Draft Abstract of NUREG/CR-2497, Precursors to Potential Severe Core Damage Accidents:1969-79. Comments Requested by 820220
References
NUDOCS 8202250366
Download: ML13308A088 (3)

Text

FEBRUARY 8 1982 Docket No.

STN 50-470 Mr. A. E. Scherer, Director Nuclear Licensing Combustion Engineering Inc.

1000 Prospect Hill Road Windsor, Conn. 06095

Dear Mr. Scherer:

In its letter to the Chairman dated December 15, 1981, the ACRS expressed concern over certain aspects of the System 80 design (CESSAR). The NRC staff is currently addressing these ACRS comments. Specifically, we are addressing the concern that the System 80 design does not include capability for rapid direct depressurization of the primary system to allow feed and bleed operations and the reliance placed upon the secondary system for heat removal capability. The Division of Systems Integration (DSI) in the Office of Nuclear Reactor Regulation (NRR) will be generating a Supplemental Safety Evaluation Report for Palo Verde and CESSAR on this issue. Their current draft report is attached. (Enclosure 1).

Since CE has been reviewing the benefits of PORV's for the System 80 and since this issue is not completely resolved, we request that you review the attached information and provide us your analysis of the need for PORV's in the System 80 design. This information is being requested in support of the CESSAR review and will be the subject of future discussions with the NRC staff.

Sincerely, Original Signed by:

Darrell G. Eisenhut, Director Division of Licensing Office of Nuclear Reactor Regulation

Enclosure:

1. NRR Suppl. Safety Eval. Report.

93202250366 820206 PDR ADOCK 05000361 P

PDR OFFICE...

I SURNAME DATE NRC FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USGPO: 1981-335-960

BOARD NOTIFICATION DISTRIBUTION Docket File 50 -361/362 LPDR PDR NSIC TERA LB#3 FILE D. Eisenhut R. Purple S. Vargh.

T. Ippolito R. Clark R. Reid B. J. Youngblood A. Schwencer F. Miraglia J. R. Miller D. Crutchfield B. Russell D. Vassallo R. H. Vollmer H. Thompson R. Mattson S. Hanauer B. Snyder R. Hartfield, MPA OELD OI&E (3)

ACRS (16)

H. Denton E, Case PPAS M. Williams.

E. Adensam H. Rood Project Manager J. Lee bcc:

W..J. Dircks V. Stello E. Christenbury H. Shapar R. Tedesco J. Stolz

DISTRIBUTION OF BOARD NOTIFICATION BOARD NOTIFICATION 82-12 NRR DRAFT SSER QN ACRS CONCERNS REGARDING SYSTEM 80 FEED AND BLEED CAPABILITY San Onofre ACRS Members Atomic Safety & Licensing Dr. Robert C. Axtmann Board Panel Mr. Myer Bender Atomic Safety &Licensing Dr. Max W. Carbon Appeal Board Mr. Jesse C. Ebersole Docketing & Service Section Mr. Harold Etherington A.S. Carstens Dr. William Kerr Phyllis M. Gallagher, Esq Dr. Harold W. Lewis David W. Gilman Dr. J. Carson Mark Dr. Cadet H. Hand, Jr.

Mr. William M. Mathis Mrs. Lyn Harris Hicks Dr. Dade W. Moeller Mrs. Elizabeth B. Johnson Dr. David Okrent James L. Kelley, Esq.

Dr. Milton S. Plesset Janice E. Kerr, Esq.

Mr. Jeremiah J. Ray Charles R. Kocker Dr. Paul G. Shewmon Charles E. McClung, Jr., Esq.

Dr. Chester P. Siess David R.

• Pigott', Esq.

Mr. David A. Ward Alan R. Watts, Esq.

Richard J. Wharton, Esq.

Stephen Eilperin, Esq.

Dr. Reginald Gotchy Dr. W. Reid Johnson