ML19276G909

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Withdraws 730419 Commitment to Install Decoupling Devices Between Recirculation Pump & Motor as Means of Preventing Overspeeds Following Loca.Ge Rept NEDO-10677 States Measures Are Unnecessary
ML19276G909
Person / Time
Site: FitzPatrick Constellation icon.png
Issue date: 08/22/1979
From: Early P
POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To: Ippolito T
Office of Nuclear Reactor Regulation
References
JPN-79-52, NUDOCS 7908280601
Download: ML19276G909 (2)


Text

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POWER AUTHORITY OF THE STATE OF NEW YORK 10 CoLUMaus CIRCLE NEW YORK, N. Y. too19 (212) 397 6200 8 August 22, 1979 JPN-79-52 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. Thomas A. Ippolito, Chief Operating Reactors Branch No. 3 Division of Opera %ag Reactors

Subject:

James A. FitzPatrick Nuclear Power Plant Docket No. 50-333 Recirculation Pung Overspeed Decoupler

Dear Sir:

By letter dated April 19, 1973 (Asa George to John F.

Stolz) to the U. S. Nuclear Regulatory Commission, the Power Authority committed to the installation of decoupling devices between the recirculation pump and motor as a means of preventing overspeed following a loss-of-coolant accident. This April, 1973 letter also transmitted a report entitled "Probabilistic Analysis of the Effects of Missiles Formed in the .r.acirculation System Following Postulated Pipe Rupture".

Supplement 2 to the James A. FitzPatrick Safety Evaluation Report, dated October 4, 1974, referred to the April 19, 1973 committment (subsequently incorporated as Supplement 20 to the Final Safety Analysis Report for FitzPatrick), accepting the conclusions of the report and stating that a two year installation delay was acceptable.

Meanwhile, General Electric Company had requested that the Commission terminate review of GE Topical Report NEDO-10677

" Analysis of Recirculation Pump Overspeed in a Typical General Electric Boiling Water Reactor" and its Supplement No. 1, since subsequent study had led to the conclusion that decouplers were not needed. This request was transmitted by General Electric to the Commission on November 6, 1975, and acknowledged by the Commission in a November 19, 1976 letter to General Electric (O. D. Parr to G. G. Sherwood) and requested General Electric to submit additional information to justify such a conclusion. In

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7908280soi 204i 205

. t ,7 response to that request, a January 18, 1977 letter from E. A. Hughes of General Electric to R. C. DeYoung of the Commission transmitted additional analytical information supporting the conclusion that a recirculation pump decoupler is not required on General Electric Boiling Water Reactors, with attachment entitled " Analysis of Recirculation Pump Under Accident Conditions, January 14, 1977".

The Power Authority understands that based upon analyses to date the NRC has designated the question of recirculation pump overspeed as a generic issue to be resolved under Task Action Plan B-68.

The Power Authority hereby withdraws its commitment to install a motor decoupling device and instead commits to imple-ment the generic resolution of this concern which may show no need for a decoupler. In support of this action, the Power Authority requests that the GE Topical Report NEDO-10677 and the GE letter of January 18, 1977 and attachments be added to the JAFNPP docket. The Authority has reviewed the above documents and agrees with the General Electric position that decoupling devices are not necessary.

Very truly,yours,

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,j'}C Paul J. Early Assistant Chief Engineer-Projects 204i 206