ML13333A524

Informs NRC That in Situ Testing of Fire Detection Sys Will Be Deferred Until Acceptable Method Is Developed to Ensure That Station Will Not Be Adversely Affected.Util Will Proceed W/Inplace Sensitivity & Loop Voltage Tests

ML13333A524
Person / Time
Site:	San Onofre
Issue date:	03/06/1980
From:	Baskin K Southern California Edison Co
To:	Ziemann D Office of Nuclear Reactor Regulation
References
TAC-48143 NUDOCS 8003120430
Download: ML13333A524 (1)

Text

Southern California Edison Company t

F. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 K. P. BASKIN March 6, 1980 TELEPHONE MANAGER, NUCLEAR ENGINEERING (213) 572-1401 AND LICENSING Director, Office of Nuclear Reactor Regulation Attention: D. L. Ziemann, Chief Operating Reactors Branch #2 Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Gentlemen:

Subject:

Docket No. 50-206 Fire Protection Program Review San Onofre Nuclear Generating Station Unit 1 By letter dated January 23, 1980 (Item 9 of the Enclosure to that letter), we committed to perform insitu tests of the fire detection system as required by the NRC, in the areas where modifications would be completed during the refuel ing outage scheduled to begin in April, 1980. During a telephone discussion on February 22, 1980 with Mr. L. Dedarian of your staff, we were informed that our planned method of insitu testing would be unacceptable since smoke would be introduced into areas with sensitive equipment and that, in fact, the NRC Staff has determined that an acceptable method for this type of testing does not exist in the industry at the present time.

The purpose of this letter is to inform you that the insitu tests will be deferred until such time as an acceptable method is developed to insure that the test does not adversely affect the station. We will notify you of our proposed method at that time in order to obtain your concurrence on the acceptability of the method to be used prior to initiation of the testing. In the interim, sufficient assurance of the adequacy of the detector location is provided by the fact that the design was based on compliance with the guide lines contained in NFPA 72E and the good engineering judgement derived from considerable experience in this type of application provided by our consul tants, the FPE Group.

In addition, it is planned to proceed with inplace sensitivity and loop voltage tests to determine acceptable detector response since these tests do not involve the introduction of smoke into the areas.

If you have any questions or desire additional information, please contact me.

Very truly yours, 6O*10L43C>