ML19030A744

Referring NRC Letters of 6/22/1977 & 9/2/1977, Providing Description & Evaluation of Design Measures to Minimize Potential for Water Hammer, as Requested

ML19030A744
Person / Time
Site:	Salem
Issue date:	01/10/1978
From:	Public Service Electric & Gas Co
To:	Lear G Office of Nuclear Reactor Regulation
References
Download: ML19030A744 (1)

Text

PS~G Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201/430-7000 January 10, 1978 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: Mr. George Lear, Chief Operating Reactors Branch No. 3 Division of Operating Reactors Gentlemen:

STEAM GENERATOR FEEDWATER WATER HAMMER NO. 1 UNIT SALEM NUCLEAR GENERATING STATION Ref. 1: LETTER DATED JUNE 22, 1977 FROM G. LEAR, USNRC TO F. P. LIBRIZZI, PSE&G, THIS SUBJECT Ref. 2: LETTER DATED SEPTEMBER 2, 1977 FROM G. LEAR, USNRC TO F. P. LIBRIZZI, PSE&G, THIS SUBJECT We have reviewed the referenced letters regarding the subject of water hammer in the Salem No. 1 Unit Plant. The Reference 2 letter requests a description and evaluation of the measures which we are implementing to minimize the probability of a detrimental water hammer in the Salem No. 1 Unit Feedwater System. The Reference 1 letter requests certain modifications to and the clarifications of a test program which we proposed to demonstrate the efficacy of these measures and justify removal of our rate of level recovery license restriction.

This letter is intended to both provide you with the descrip-tion and evaluation which you requested in the Reference 2 letter and to inform you that we do not presently anticipate carrying out the proposed test program discussed in the Reference 1 letter.

Design Measures to Minimize Potential for Water Hammer The entire subject of steam generator feedwater water hammer has been closely followed by Public Service since its inception as a generic concern, especially with regard to the design of the Salem units. Upon identification by the industry of measures commonly accepted as effective in reducing the potential for water hammer events, these design measures were incorporated into the Salem design. Specifically:

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