ML13317A851

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Advises That Addl Mechanical Equipment Re Automatic Initiation of Auxiliary Feedwater Sys Requires Upgrading from control-grade to safety-grade.Equipment Includes Relief Valve on Steam Supply to Turbine Driven Pump
ML13317A851
Person / Time
Site: San Onofre Southern California Edison icon.png
Issue date: 02/02/1982
From: Baskin K
Southern California Edison Co
To: Crutchfield D
Office of Nuclear Reactor Regulation
References
TAC-44652, TASK-2.E.1.2, TASK-TM NUDOCS 8202050117
Download: ML13317A851 (1)


Text

Southern California Edison Company P. 0.

BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 K. P. BASKIN TELEPHONE MANAGER OF NUCLEAR ENGINEERING, February 2, 1982 (213) 572-1401 SAFETY, AND LICENSING Director, Office of Nuclear Reactor Regulation Attention:

D. M. Crutchfield, Chief Operating Reactors Branch No. 5 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.

20555 Gentlemen:

Subject:

Docket No. 50-206 Automatic Initiation of the AFWS San Onofre Nuclear Generating Station Unit 1 By letter dated October 16, 1981, we provided information requested by members of your staff regarding electrical equipment which is part of the AFWS automatic initiation and flow indication circuit modifications that was installed as controls grade and will be upgraded to safety grade. This letter is to inform you that there also exists mechanical equipment which is now controls grade and will be upgraded to safety grade. This equipment consists of:

1) the relief valve on the steam supply to the turbine driven AFWS pump, RV-3206;
2) the positioner and air set for the AFWS flow control valves FCV 2300, 2301, 3300, 3301;
3) the backup nitrogen supply for the flow control valves identified in 2 above.

It is now estimated that the required upgrading of this equipment can be completed prior to startup from the next refueling outage.

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

Very truly yours, 8202050117 820202 77l PDR ADOCK 05000206 PPDR

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