ML19331B903
| ML19331B903 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/04/1980 |
| From: | Murray T TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML19331B901 | List: |
| References | |
| NUDOCS 8008130507 | |
| Download: ML19331B903 (1) | |
Text
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c TELECCPY h Received August 4, 1980 Verified Receipt: h no
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TO:
U. S. Nuclear Regulatory Commisssion Office of Inspection and Enforcement Region III Attention:
Tom Tambling s
SUBJECT:
Interruption of Decay Heat Flow.
Davis-Besse Unit 1-Mode 5 Power (MWT)=0, Load (Gross MWE)=0 At 1454 hours0.0168 days <br />0.404 hours <br />0.0024 weeks <br />5.53247e-4 months <br /> on August 3,1980, Instrument and Controls personnel were removing Safety Features Actuation System (SFAS) Channel 4 bistable i
BA413 and accidentally caused Decay Heat Isolation Valve DHil to travel closed. The reactor operator immediately stopped DH pump 1-1.
This stopped decay heat flow for approximately 3 minutes until the bistable could be re-installed and the pump restarted.
This occurrence placed the unit in violation of Technical Specification 3.4.1 which requires at least one decay-heat pump-be in operation while the unit is in Mode 5.
This incident is being reported in accordance with Technical Specification 6.9.1.8.b.
Luis Reyes, Davis-Besse Unit 1 Resident Inspector, was notified at 220 hours0.00255 days <br />0.0611 hours <br />3.637566e-4 weeks <br />8.371e-5 months <br /> on August 4, 1980.
7 D. W & lA m Terry D. Murray Station Superintendent Davis-Besse Nuclear Power Station Toledo Edison Company TDM/mmb r
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