05000346/LER-1978-100-03, /03L-0:on 781001,during Surveillance Testing, Calculated Value for Unidentified RCS Leakage Exceeded 1 Gallon Per Minute Limit by 0.08 Gallons Per Minute.Caused by Increased Reactor Coolant Pump Seal Leakage

/03L-0:on 781001,during Surveillance Testing, Calculated Value for Unidentified RCS Leakage Exceeded 1 Gallon Per Minute Limit by 0.08 Gallons Per Minute.Caused by Increased Reactor Coolant Pump Seal Leakage

ML19256A144
Person / Time
Site:	Davis Besse
Issue date:	10/27/1978
From:	Fulmer S TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19256A143	List: 05000346/LER-1978-100, Forwards LER 78-100/03L-0 05000346/LER-1978-100-03, /03L-0:on 781001,during Surveillance Testing, Calculated Value for Unidentified RCS Leakage Exceeded 1 Gallon Per Minute Limit by 0.08 Gallons Per Minute.Caused by Increased Reactor Coolant Pump Seal Leakage
References
LER-78-100-03L, LER-78-100-3L, NUDOCS 7811030158
Download: ML19256A144 (1)

LER-1978-100, /03L-0:on 781001,during Surveillance Testing, Calculated Value for Unidentified RCS Leakage Exceeded 1 Gallon Per Minute Limit by 0.08 Gallons Per Minute.Caused by Increased Reactor Coolant Pump Seal Leakage

Event date:
Report date:
3461978100R03 - NRC Website

text

U. S. NUCLE AR REGULATCRY COMMISSION N RC' F O R *

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8 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES O'o the calculated l

0625 hours0.00723 days <br />0.174 hours <br />0.00103 weeks <br />2.378125e-4 months <br /> on 10/1/78, during perf ormance of surveillance testing, [ol2l l At i value for unidentified Reactor Coolant System (RCS) leakage exceeded the 1 GPM limit l

_o # a in the Action Statement of Technical Specification l lby 0.08 GPM.

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0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br /> on 10/1/78, the increased leagage was identified by a l

l (T.S.) 3.4.6.2.

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s of the Reactor Coolant Pumps standpipe leak-off..This reduced the uniden-l 101c] l measurement from the Action Statement of T.S.

l l o j 7 ) l tified Icakage to 0.54 GPM, and removed the unit The small leakages were processed through the normal containment sump.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Investi-Increased Reactor Coolant Pump seal leakage is the cause of this occurrence.

Wgl gation into the possibility of installing more accurate seal leakage indication is J

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continuing per Facility Change Request 78-357.

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419-259-5000. Ext. 276 7

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