ML19276E492

in Response to NRC 790131 Ltr,Plant Will Be Designed & Constructed to Implement Design Options Prior to Final Decision on ATWS Issue

ML19276E492
Person / Time
Site:	Green County
Issue date:	03/07/1979
From:	Early P POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	Baer R Office of Nuclear Reactor Regulation
References
GPO-792, NUDOCS 7903140324
Download: ML19276E492 (2)

Text

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POWER AUTHORITY OF THE STATE OF NEW YORK 10 CoLUMeus CIRCLE NEW YORK. N. Y.10019 42121 397.6200 TRUSTEES GEORGE T. BERRY FREDERICK R. CLARK

\  %/ G NERAL COUNSEL 4ND oEORoE t iNoAtos ,e , g; * ',^,",' "

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• uceca.m..- pg gyg, 5 JOSEPH R. SCHMIEDER RICH ARD M. FLYNN CM'EF ENGINEER JOHN W BOSTON ROBERT l. MILLONZ1 CIRECTOR OF

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witu AM F. tuooY March 7, 1979 THOM A S F. McCR AN N. JR.

GPO-792 Director, Office of Nuclear Reac'or c Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: Mr. Robert L. Baer, Chief Light Water Reactor Branch No. 2

Subject:

Greene County Nuclear Power Plant Anticipated Transient Without Scram (ATNS)

Docket No. 50-549

References:

(1) NRC letter from Mr. R.L. Baer to Mr. G.T. Berry (PASNY ) , dated January 31, 1979.

(2) PASNY letter GPO-787, dated February 16, 1979

Dear Mr. Baer:

This letter responds to the Reference (1) NRC letter by providing a commitment that the Greene County Nuclear Power Plant will be designed and constructed such that implementation of the design options specified in Reference (1) will not be orecluded prior to a final decision on the anticipated Transient Without Scram (ATWS) issue. The NRC states in NUREG 0460 that issuance of a final decision on ATWS is expected by about November 1, 1979.

The Authority has reviewed Reference (1) with our NSSS supplier, Babcock & Wilcox, and our A/E, Stone & Webster. Based upon this consultation the Authority concludes that the Greene County Nuclear Power Plant design and construction has not oroceeded to a point which forecloses implementation of the three possible design modifications specified to resolve ATWS in Reference (1). It should be noted . however, that fabrication of the pressurizer, which is about 00 percent complete, has progressed past the manufacturing sequence where pressurizer nozzles are fitted and welded to the upper pressurizer head and then stress y relieved. Additional nozzles to accommodate increased relief t, g g s .

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j Mr. Robert L. Baer - 2' - GPO-792 capacity, which you indicate in item 2 of Reference (1) may be necessary, can only be installed via a costly backfit program.

The Authority requests that the NRC take this into account when final ATWS requirements for the Greene County Nuclear Power Plant are formulated. The Authority is villing to meet with the NRC to discuss these costs in more detail if necessary.

Very truly yours, Paul J. Early Assistant Chief Engineer, Projects