05000318/LER-1979-047-03, /03L-0:on 791204,while Performing post-refueling Low Power Physics Test,Average Temp Dropped Below Tech Specs.Caused by Operator & Erratic Control of Turbine Bypass Valves

/03L-0:on 791204,while Performing post-refueling Low Power Physics Test,Average Temp Dropped Below Tech Specs.Caused by Operator & Erratic Control of Turbine Bypass Valves

ML19290C278
Person / Time
Site:	Calvert Cliffs
Issue date:	01/04/1980
From:	Davis S BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19290C275	List: 05000318/LER-1979-047, Forwards LER 79-047/03L-0 05000318/LER-1979-047-03, /03L-0:on 791204,while Performing post-refueling Low Power Physics Test,Average Temp Dropped Below Tech Specs.Caused by Operator & Erratic Control of Turbine Bypass Valves
References
LER-79-047-03L, LER-79-47-3L, NUDOCS 8001100472
Download: ML19290C278 (1)

LER-1979-047, /03L-0:on 791204,while Performing post-refueling Low Power Physics Test,Average Temp Dropped Below Tech Specs.Caused by Operator & Erratic Control of Turbine Bypass Valves

Event date:
Report date:
3181979047R03 - NRC Website

text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7-77)

LICENSEE EVENT REPORT CONTROL BLOCK:

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7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO 57 CA T 58 CON'T Eu,y Ll@

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60 61 DOCKET NUMB EF 68 63 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES o

2 i At 1520 while performing a post refue ina low power physics test, Tave 1 dronced below 515 F contrary to the recuirements of T.S. 3.1.1.5.

The

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Operator immediately tripped the reactor and placed it in hot standby, l

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l since in his judoment Tave could not be restored to greater than 515 F l

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I within 15 minutes. LER 76-11 describes a similar event.

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l The cause was due to the Ooerator overfeeding the steam qenerator and erratic l

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