ML14138A067
| ML14138A067 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/28/1982 |
| From: | Baskin K Southern California Edison Co |
| To: | Miraglia F Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML13317A128 | List: |
| References | |
| NUDOCS 8206020433 | |
| Download: ML14138A067 (2) | |
Text
Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 K. P. BASKIN May 28, 1982 TELEPHONE MANAGER OF NUCLEAR ENGINEERING, (213) 572-1401 SAPETY, AND LICENSING Director, Office of Nuclear Reactor Regulation Attention:
Mr. Frank Miraglia, Branch Chief Licensing Branch No.
3 U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
Subject:
Docket Nos. 50-206, 50-361 and 50-362 San Onofre Nuclear Generating Station Units 1, 2 and 3 On May 14, 1982, the Atomic Safety and Licensing Board (Board) for San Onofre Nuclear Generating Station, Units 2 and 3 (SONGS 2&3) issued an Initial Decision concerning the full power license emeryency planning issues.
The Board's decision authorizes the Director of Nuclear Reactor Regulation to issue full-power licenses for SONGS 2&3, subject to certain conditions.
Specifically, Condition V.C.1 on page 214 of the Board's decision requires NRC staff confirmation that the siren system has been shown to perform in accordance with its technical specifications.
On May 20, 1982, Southern California Edison (SCE) submitted in my letter to you, a copy of a letter dated March 25, 1982, from Mr. F. K. Massey (SCE) to Mr. Kenneth Nauman of the Federal Emergency Management Agency (FEMA).
The March 25 letter enclosed the Performance Test Report on the SONGS public alert system, including acoustic test results for the system's tests performed from January 26-29, 1982. Those results indicated that the acoustic output of the sirens was lower than that specified by the siren manufacturer.
Subsequently, SCE replaced 39 of the existing sirens with another manufacturer's sirens which have a greater measured sound output. Because the system had been upgraded, it was decided to retest the public alert system to supplement the previous test results.
The retest was conducted on May 24, 1982. The test consisted of the sounding of all sirens and the taking of acoustic measurements at those locations that failed to meet the 60 dB(C) signal level and the 10 dB signal-to-noise ratio criteria in January 1982.
Because all of the replacement sirens produce acoustic outputs equal to or greater than the sirens which they replaced, there was no reason to retest measurement locations which had acceptable results in the January 26-29, 1982 tests. Results of the retest are reported in the enclosed report titled "Acoustical Test of Prompt Alerting System for San Onofre Nuclear Generating Station," dated May, 1982. Seven (7) copies of the report which was prepared by Wyle Research for SCE are enclosed. Use NRC Mail Distribution Code B028.
In summary, the results of the January 26-29, 1982 and May 24, 1982 siren tests show that:
8206020433 820528 PDR ADOCK 05000206 F
Mr. Frank Miraglia May 28, 1982
- 1.
35 sirens operated on the retest; 5 sirens failed to operate.
These failures are attributed to startup problems following the system upgrade.
The problems are not significant and will be corrected and siren operability confirmed by growl testing from the "control centers" by June 1, 1982.
- 2.
For the two sets of tests considered together, at 70 of the 81 measurement locations, 86 percent, signal levels exceeded the 60 dB(C) criteria and the signal-to-noise ratio exceeded the 10 dB criteria.
- 3.
Two additional sites will potentially meet the criteria when the sirens which failed to operate are remedied, raising the percentage of acceptable locations to 89 percent.
- 4. With the installation of the improved sirens, the sound output of the public alert system has been significantly improved.
As the other 5 sirens are made operable and additional sirens are installed in the extended EPZ in accordance with the Board's Initial Decision, the criteria is expected to be met at greater than 90 percent of the measurement locations.
Based on these results, SCE considers that an adequate public alert system has been installed and demonstrated to perform in accordance with expectations. Accordingly, SCE considers that the information enclosed with this letter together with the information provided with the March 25, 1982 letter provides sufficient information for the NRC to confirm to the Board that Board condition V.C.1 has been satisfactorily resolved.
Further, it is SCE's belief that the information provided in this letter, along with the information provided in the May 20, 1982 letter which was referenced earlier and which addressed Board conditions V.C.3 and V.C.4 in addition to V.C.1, is sufficient for the NRC to confirm to the Board, the resolution of all Board conditions pertaining to full power operations.
If you have any questions regarding this information, please call me.
Very truly yours, Enclosures cc:
Brian K. Grimes, NRC (w/encl)
Harry Rood, NRC (w/encl)
R. H. Engelken, NRC Region V (w/encl)
K. Nauman, FEMA