ML20247M051

Rev 1 to Monthly Operating Rept for Jul 1989 for Davis-Beese Nuclear Power Station,Unit 1

ML20247M051
Person / Time
Site:	Davis Besse
Issue date:	07/31/1989
From:	TOLEDO EDISON CO.
To:
Shared Package
ML20247L978	List: ML20247L974 ML20247M045 ML20247M051
References
NUDOCS 8909250121
Download: ML20247M051 (1)

Text

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Revision 1 September 1989 i

OPERATIONAL

SUMMARY

July, 1989 Reactor power was maintained at approximately 100% full power until 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> on July 2, 1989, when a manual power reduction to approximately 85% vas initiated to perform turbine valve testing.

After completion.of the turbine testing, reactor power was slowly increased to approximately 100% full power which was attained at 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br /> on July 2, 1989.

Reactor power was maintained at approximately 100% full power until 0136 hours0.00157 days <br />0.0378 hours <br />2.248677e-4 weeks <br />5.1748e-5 months <br /> y

on July 9, 1989, when a manual power reduction to approximately 95% was initiated to perform turbine valve testing.

Reactor power was slowly increased following the turbine valve testing to approximately 100% fu13 power which was attained at 0500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> on July 9, 1989.

Reactor power was maintained at approximately 100% full power until 12L7 hours on July 10, 1989, when power was reduced to approximately 98% due to a high condenser pressure caused by the high circulating water temperature. The high circulating unter temperature was attributed to hot and humid weather conditions. Reactor power was maintained at approximately 98% until 2400 hours0.0278 days <br />0.667 hours <br />0.00397 weeks <br />9.132e-4 months <br /> on July 10, 1989, when reactor power was slowly increased to approximately 100% full power which was attained on 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> on July 11, 1989.

Reactor power was maintained at 100% full power until 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> on July 23, 1989, when a manual power reduction to approximately 92% vas initiated to perform turbine valve testing and control rod drive exercise testing. An engineering evaluation is in progress to change the frequency of main turbine testing. A single monthly power reduction to accomplish control rod exercise testing and turbine valve testing is anticipated.

'After completion of the control rod drive exercise testing, reactor power was slowly increased to approximately 100% which was attained at 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br /> on j

July 23, 1989, and maintained at this power level until 0912 hours0.0106 days <br />0.253 hours <br />0.00151 weeks <br />3.47016e-4 months <br /> on i

July 23, 1989, when a manual power reduction to approximately 50% vas initiated due to a dropped control rod (rod 7-5), caused by a blown fuse on phase "CC" in the transfer switch for rod 7-5.

The fuse blev as a result of an over current condition. The fuse was replaced and reactor power was slowly l

increased to approximately 100% full power which was attained at 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> on July 24, 1989, and maintained at this power level until 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> on July 30, 1989, when a manual power reduction to approximately 85% power was I

initiated to perform turbine valve testing and main turbine-generator performance testing.

g After completion of the turbine testing, reactor power was slowly increased to 100% full power and remained at this power for the rest of the month.

8909250121 890915 PDR ADOCK 05000346 R

FDC

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