05000298/LER-1980-022-03, /03L-0:on 800629,during Normal Operation,While Discharging RHR to Radwaste,Inboard Throttle Isolation Valve RHR-MO-57 Could Not Be Manually or Remotely Operated.Caused by Seat Jamming Disc.Seat Replaced & Valve Ordered

/03L-0:on 800629,during Normal Operation,While Discharging RHR to Radwaste,Inboard Throttle Isolation Valve RHR-MO-57 Could Not Be Manually or Remotely Operated.Caused by Seat Jamming Disc.Seat Replaced & Valve Ordered

ML19337B604
Person / Time
Site:	Cooper
Issue date:	09/12/1980
From:	Doan P NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19337B598	List: 05000298/LER-1980-022, Forwards Updated LER 80-022/03L-1 05000298/LER-1980-022-03, /03L-0:on 800629,during Normal Operation,While Discharging RHR to Radwaste,Inboard Throttle Isolation Valve RHR-MO-57 Could Not Be Manually or Remotely Operated.Caused by Seat Jamming Disc.Seat Replaced & Valve Ordered
References
CNSS800555, LER-80-022-03L, LER-80-22-3L, NUDOCS 8010070491
Download: ML19337B604 (2)

LER-1980-022, /03L-0:on 800629,during Normal Operation,While Discharging RHR to Radwaste,Inboard Throttle Isolation Valve RHR-MO-57 Could Not Be Manually or Remotely Operated.Caused by Seat Jamming Disc.Seat Replaced & Valve Ordered

Event date:
Report date:
2981980022R03 - NRC Website

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v N Rb' FORM 366 UPDATED REPORT U. S. NUCLEAR CEGULATGY COMMISSION 1 (7 77)

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8 60 61 OOCKET NUMBER b8 69 EVENT DATE 14 iS REPORT DATE 40 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h L_L2j puring normal operation, while discharging RHR to radwaste, the inboard throttle iso-j o

ioIai lation valve (RHR-MO-57) could not be operated either manually or remotely. In the l

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f Tn tirawing number 1655-3 globe valve. The seat was replaced and tack welded to prevent i LLJ._ ] frecurrence. The vendor was not aware this valve was intended to be throttled. A mod-l lified valve has been ordered and will be installed in place of the existing valve.

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