ML17261B262

Advises That NRC Will Defer Further Review on post-CP Design Changes in PSAR Amend 22 Until OL Applications Are Filed for Facilities

ML17261B262
Person / Time
Site:	Columbia, Washington Public Power Supply System
Issue date:	11/18/1976
From:	Parr O Office of Nuclear Reactor Regulation
To:	Stein J WASHINGTON PUBLIC POWER SUPPLY SYSTEM
Shared Package
ML17261B261	List: ML17261B260 ML17261B262
References
NUDOCS 8104140421
Download: ML17261B262 (3)

Text

UNITEDSTATES NUCLEAR REGULATORYCOMMISSION WASHINGTON, D. C. 20555 Docket Nos.

50-460 and 50-513 NDV 10 1976 car-

<-"~'ECEiyi=D NDV PP 1976 DIRECTOR'S OFFICE Gentlemen:

Washington Public Power Supply System ATTN:

Mr. J. J. Stein Managing Director.

P.

O.

Box 98 3000 George Washington Way

Richland, Washington 99352 DIRECTOR'S OFFICE JJS ADMIN. FILES LLM+'ROJ. FILES MOS

~PCO DLR JSlv1 RH Vi'V hIAC

~RK I

C CHRONO WPPSS NUCLEAR PROJECT NOS.

1 & 4 - REVlEW OF PSAR AMENDMENT NO.

22 Your letter dated October 22, 1976 transmitting Amendment No.

22 references your letter of April 23, 1976, wherein the design changes incorporated in Amendment 22 were first described to the NRC.

In that earlier letter you noted. that none of the changes, in your opinion, were "nonconservative departures" from the principal engineering methods and criteria previously committed to in the PSAR.

On the basis of the information supplied in your letter, we do not believe you are proposing a change to the principal architectural and engineering criteria you previously committed to in your letter.

While we provided preliminary comments on your April 23, 1976, letter in our letter of October 19,

1976, we intend to defer further staff review on these post-CP design changes until you file an application for operating licenses for the WNP-l, 4 plants.

Regarding your responses to issues previously identified by the staff (during our construction permit review) as open issues to be worked on during the post CP period, we will review your submittals and report our conclusions to you.

The only issue in this category addressed by Amendment No.

22 is item 3 in your October 22, 1976 letter.

Items 5 and 6 in your letter refer to staff questions concerning both reactor vessel support analyses and containment subcompartment design analyses.

Several B&W topical reports referred to have not yet been submitted for staff review.

We believe that further staff effort on the vessel support issue on this docket should be scheduled only after the staff receives at least the planned B&W topical reports concerning pipe break criteria and LOCA forcing functions.

Washington Public Power Supply System 2

ggy yp ]gyp We also understand that, in response to our concerns for.your guard-pipe design. expressed in our letter of October 19,

1976, your staff is still working on an evaluation of hypothetical pipe breaks that could affect your proposed design and your specification of design loads on subcompartment walls.

We will defer further consideration of reactor vessel supports and containment subcompart'ment analyses pending your future submittals.

Regarding future submittals concerning proposed design

changes, you first should make your own findings as to whether a modification under consideration represents a change in the principal. engineering or architectural criteria. If you believe that a proposed modification is a change to the principal architectural and engineering criteria, then you should notify us in writing and provide a complete description of the proposed modification including the basis for your finding. If we conclude that a change to the principal architectural and engineering criteria is being proposed we will review the proposed modification and advise you accordingly.

We will not initiate a review of a proposed modification unless you inform us that you believe a change in the principal architectural and engineering criteria is proposed.

If you require additional clarification or discussion of our intent regarding post-CP design changes, please contact us.

Sincerely, lan D. Parr, Chief Light Water Reactors Branch No.

3 Division of Project Management cc:

Mr. J.

R. Schmieder United Engineers

& Constructors, Inc.

30 South 17th Street Philadelphia, Pennsylvania 19103 Joseph B. Knotts, Jr.

Esq.

Conner

& Knotts 1747 Pennsylvania

Avenue, N.W.

'Washington, D.C.

20036 Mr. E. G.

Ward Senior Project Manager Babcock

& Wilcox Company P. 0. Box 1260 Lynchburg, Virginia 23505

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