05000267/LER-1980-015-03, /03L-0:on 800320,during Operation at Approx 60% Power,Emergency Feedwater Header Supply to Loop 2 Helium Circulation Water Turbine Drives Was Isolated to Repair Leaking Pressure Control Valve.Caused by Loose Block Bolt

/03L-0:on 800320,during Operation at Approx 60% Power,Emergency Feedwater Header Supply to Loop 2 Helium Circulation Water Turbine Drives Was Isolated to Repair Leaking Pressure Control Valve.Caused by Loose Block Bolt

ML19309E760
Person / Time
Site:	Fort Saint Vrain
Issue date:	04/18/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19309E759	List: 05000267/LER-1980-015, Forwards LER 80-015/03L-0 05000267/LER-1980-015-03, /03L-0:on 800320,during Operation at Approx 60% Power,Emergency Feedwater Header Supply to Loop 2 Helium Circulation Water Turbine Drives Was Isolated to Repair Leaking Pressure Control Valve.Caused by Loose Block Bolt
References
LER-80-015-03L, LER-80-15-3L, NUDOCS 8004240328
Download: ML19309E760 (1)

LER-1980-015, /03L-0:on 800320,during Operation at Approx 60% Power,Emergency Feedwater Header Supply to Loop 2 Helium Circulation Water Turbine Drives Was Isolated to Repair Leaking Pressure Control Valve.Caused by Loose Block Bolt

Event date:
Report date:
2671980015R03 - NRC Website

text

_ _ _ _ _ _ _ _ _ - _

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSitN

'T.77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) lo lil l C l 0 l F l S lV l 1 l@l 010 l-l 0 l0 l0 l010 l-l0 l0 l@l4 l1 l1 l2 l 0 l@l l

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7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58 CON'T s$RCI l L l@l 0 l 5 l 0 l 0 l0 l 2 l 6 l 7 @l 0 l 312 l0 l 8 l0 l@l0 l4 l1 l 8 l 8 l0 l@

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8 60 61 OOCKET NUM8ER 68 69 EVENT DATE 74 75 REPORT CATE 80 EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES h l o l 21 l From 1105 to 1505 hours0.0174 days <br />0.418 hours <br />0.00249 weeks <br />5.726525e-4 months <br /> on March 20, 1980, with the plant operating at approximately l

lo lal 1 60% thermal power and 216 MWe, the emergency feedwater header supply to Loop 2 helium l l o la I [ circulator water turbine driver was isolated to repair a leaking pressure control l

Ioisl l valve. This resulted in operation in a degraded mode of LCO 4.2.2(a) and is re-l ITTs 1 l portable per Fort St. Vrain Technical Specification AC 7.5.2(b)2.

No accompanying l

[ol7l l occurrence or probable consequences. No affect on public health or safety.

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COE SUSC E COMPON ENT CODE 508 ODE SU E

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9 10 11 12 13 18 19 20 SEQUENTI AL OCCURRENCE REPCRT REVISION LER EVENT YEAR R EPORT NO.

COOE TYPE NO.

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33 34 33 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS h lilol lCause of valve leakage was a loose bole on hinck.rh4 rb i n ch nn a m *

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g istem of a Masoneilan pressure control valve. This did not allow proper stroking,

_i i,;7, lresulting in valve leakage. Block cleaned and re-assembled. Valve stroke calibrated. J i, ;3l l Valve and system returned to service. No further corrective action anticipated or l

[il4[ l required.

l 7

a 9 80 ST

% POWER oTHER STATUS 015 O RY DISCOVERY OESCRIPTION l1 l5 l l E l@ l 0l 6l 0l@lN/A l

l Al@l Personnel Observation l

ACTIVITY CC TENT RELEASED vP AELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE It i6I l Z l lZh!N/A l

l N/A l

7 3 3 10 11 44 45 80 PERSONNEL ExPOSUMES NUM8ER TYPE OESCRIPTION 39 l i 17 l l 0 l 0 l 0 l@l Z l@l N/A l

PERSON ~EL mu'AEs NUMBER

DESCRIPTION

li t a l 1010101@l N/A I

7 8 3 11 12 80

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d 9 to 80 PUBLICITY NRC USE ONLY

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