ML20027A286
| ML20027A286 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 10/23/1978 |
| From: | Murray T TOLEDO EDISON CO. |
| To: | Tambling T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 7811090131 | |
| Download: ML20027A286 (1) | |
Text
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TO:
U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region III A'ITENTION: Tom Tambling
SUBJECT:
Reportable Occurrence Per Technical Specification 6.9.1.8.i Davis-Besse Unit 1 Mode 5, Power (Mifr) = 0 and Load (MNE) - 0 As a result of our study of the protection against degraded grid frequency, we have found that added protection is required for the case of the plant o'erating with the in house loads on the startup transformers (01 and 02). Ife will add underfrequency relays which will trip the secondary side breakers on 01 and 02 transformers when an underfrequency condition exists.
T. Tambling, NRC Region III, notified via telephone at 1245 hours0.0144 days <br />0.346 hours <br />0.00206 weeks <br />4.737225e-4 months <br /> on October 23, 1978.
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Terry D. Murray Station Superintendent Davis-Besse Nuclear Power Station Toledo Edison Company TDM/ daw I
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