ML13308B529
| ML13308B529 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 08/02/1976 |
| From: | Fogarty D SOUTHERN CALIFORNIA EDISON CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| IEB-76-06, IEB-76-6, NUDOCS 8103110142 | |
| Download: ML13308B529 (3) | |
Text
Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE DAVID J. FOGARTY ROSEMEAD, CALIFORNIA 91770 TELEPHONE vc.
.. sEN 213-572-2796 August 2, 1976 U. S. Nuclear Regulatory Commission Region V Office of Inspection and Enforcement Walnut Creek Plaza, Suite 202 1990 North California Boulevard Walnut Creek, California 94596 Docket No. 50-206 Attention:
R. H. Engelken, Director
Dear Sir:
IE Bulletin No.-76-06 Diaphragm Failures in Air Operated Auxiliary Actuators for Safety/Relief Valves Reference is made to your correspondence of July 21, 1976 for warding the subject bulletin. A thorough investigation and review of our experience with safety related diaphragm operated relief valves at San Onofre Unit 1 has been completed.
The following provides specific response to items of the bulletin listed under "Action To Be Taken By The Licensee".
(1) There is no insulation installed on safety related dia phragm operated relief valves in high temperature fluid systems. This is in accordance with current valve vendor recommendations.
(2) It has been verified.that procedures used for inspection and disassembly of these valves include the inspection of the subject diaphragms to verify material condition.
(3) The vendors' recommended service and shelf life for the diaphragms are noted upon receipt. This information is again verified prior to use.
Maintenance planning pro vides for reinspection or replacement as appropriate.
-2 (4) Current practice at San Onofre includes provisions that adequately provide for the Commission's concerns and are addressed in items (1) through (3) above. Therefore, this response constitutes a final report and no further submittal will be tendered.
As of this date, there are no defective valves or unusual conditions to report. Any adverse findings resulting from future inspections will be reported in a timely manner.
Sincerely, cc:
Director, NRC Office of Inspection and Enforcement Division of Reactor Inspection Programs Washington, D. C.
20555
UNITED STATES NUCLEAR REGULATORY COMMISSION REGION V SUITE 202, WALNUT CREEK PLAZA 1990 N. CALIFORNIA BOULEVARD WALNUT CREEK, CALIFORNIA 94596 G. W. Roy, Chief, Field Coordination and Enforcement Branch Office of Inspection and Enforcement. Headquarters LICENSEE REPLIES TO IE BULLETINS 76 RELAY COIL FAILURES 76 RELAY MALFUNCTIONS Enclosed for your information is a copy of the replies to the subject IE Bulletins from the following licensees:
- 1. Pacific Gas & Electric Company, Humboldt Bay, Docket No. 50-133 Ltr. dtd 4/19/76.
- 2. Portland General Electric Company, Trojan, Docket No. 50-344 Ltr. dtd 4/14/76.
- 3. Sacramento Municipal Utility District, Rancho Seco, Docket No. 50-312, Ltr. dtd 4/14/76.
- 4. Southen-California Edison Company, n'Onofre 1, Docketf No. 50-206, Ltr. dtd 4/19/76.
Crews, Chief eactor Operations and Nuclear Support Branch cc w/encls.
IE DD/FO IE AD/RIP IE AD/MIP Standards Development Director/FL DD/Tech Review, RL AD/BWR, RL (3)
AD/PWR, RL (3)
AD/Operating Reactors, RL (3)
)Environmental Projects, RL(3 q,' R. F. Fraley, ACRS S 'Chief, Reg News Br., IS
-ELD I 'MIPC/PE Hartfield, R. A.
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