05000267/LER-1980-032-03, /03L-0:on 800617,w/plant Operating at Approx 68% Thermal Power & 193MW,PV-21243 Was Not Controlling at Appropriate Setpoint.Caused by Defective Masoneilan Pv. Devcon Applied to Seal Ring Gasket Stopped Valve Leakage

/03L-0:on 800617,w/plant Operating at Approx 68% Thermal Power & 193MW,PV-21243 Was Not Controlling at Appropriate Setpoint.Caused by Defective Masoneilan Pv. Devcon Applied to Seal Ring Gasket Stopped Valve Leakage

ML19321A523
Person / Time
Site:	Fort Saint Vrain
Issue date:	07/15/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19321A512	List: 05000267/LER-1980-032, Forwards LER 80-032/03L-0 05000267/LER-1980-032-03, /03L-0:on 800617,w/plant Operating at Approx 68% Thermal Power & 193MW,PV-21243 Was Not Controlling at Appropriate Setpoint.Caused by Defective Masoneilan Pv. Devcon Applied to Seal Ring Gasket Stopped Valve Leakage
References
LER-80-032-03L, LER-80-32-3L, NUDOCS 8007230555
Download: ML19321A523 (1)

LER-1980-032, /03L-0:on 800617,w/plant Operating at Approx 68% Thermal Power & 193MW,PV-21243 Was Not Controlling at Appropriate Setpoint.Caused by Defective Masoneilan Pv. Devcon Applied to Seal Ring Gasket Stopped Valve Leakage

Event date:
Report date:
2671980032R03 - NRC Website

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NRC FCM 366 U.3. NUGLtAH HkUULAIQHY COMMISslON (7 77)

LICENSEE EVENT REPORT

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8 60 61 CoCKET NUMB ER 68 69 EVENT OATE 74 75 REPORT OATE 80 EVENT OESCRlrTION AND PROBABLE CONSECUENCES h t o 12 l l On June 17 and 18, 1980, the plant was oper. ed at power with emergency feedwater I

lo l3l l header supply to ',oop 1 helium circulator water turbine drives isolated. Reportable I lol4l l per Fort St. Vrain Technical Specification AC 7.5.2(b) 2, degraded mode of LCO 4.2.2(al.

I o l s 1 I No affect on public health and safety. Similar occurrences reported in R0 80-15 and l lo is l l 80-23.

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 2e i1 IoI l Loon 1 emer2ency feedwater sucolv was isolated to reoair a Masoneilan cressure con-I 1i li j l trol valve. Valve repair not complete at time of return to power resulted in LCO I

i1 12 I I 4.2.2 degraded mode operation. Application of devcon to the area under the seal ringl i,;3i [ gasket alleviated valve leakage. System returned to service.

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