ML20004F578
| ML20004F578 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/15/1981 |
| From: | Haynes J SOUTHERN CALIFORNIA EDISON CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 810616, IEB-79-18, NUDOCS 8106190120 | |
| Download: ML20004F578 (2) | |
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Attention:
Mr. R. H. Engelken. Director 1.U
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Dear Ste:
IE BULLETIN 79-18 AUDIBILITY PROBLEMS.INCOUNTERED ON EVALUATION OF PERSONNEL FROM HIGH-NOISE AREAS
REFERENCES:
- 1) Letter. J. T. Head (SCE) to R.H. Engleken (NRC),
dated September 19, 1979
- 2) Letter, J. T. Head (SCE) to R.H. Engleken (NRC),
dated Decemoer 4, 1979 The referenced letters provided our response to the suoject IE Bulletin ano documented tne results of investigations into the audibility problems of the identified systems.
Signal audibility was determined to be in:ufficient in several locations and extensive modifications of the In-Plant Paging, Immediate Evacuation Signal, and Area Radiation Monit ring l
Sy tems were undertaken during the current outage.
The pnysical mocifications will be complete and the systems functionally servicaole at tne time the unit returns to service.
n occur to assure that the audibility of the equipment meets desig specification, plant operation at or near full load 's required o
estaolish the maximum background noise levels prior to complett g the systems tests, gli 8106190 W.A 6i a
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U.S. NUCLEAR REGULATORY COMMISSION IE EULLETIN 79-18 PAGE'2 Testing to verify the adecuacy of the systems under maximum noise concitions will be' completed within 30 days of the unit return to sustained full load coeration. Should the' testing-indicate that adjustments and/or repairs to systems components are necessary, corrective action will be taken to satisfy the bulletin requirements.
Please notify me if you have any questions concerning this matter.
Sincerely, A4.Jf J. G. HAYNE MANAGER OF NUCLEAR OPERATIONS FB:eg cc:
L. Miller NRC Resident Inspector Director, Office of Inspection and Enforcement Olvision of Reactor Operations Inspection d
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