05000298/LER-1980-043-03, /03L-0:on 801021,motor Operated Valve SW-MO-89B Failed to Open.Caused by Broken Wire Connected to Ohmite 1000-ohm Variable Resistor Inside Valve Operator.Broken Lead Resoldered & Circuit Checked

/03L-0:on 801021,motor Operated Valve SW-MO-89B Failed to Open.Caused by Broken Wire Connected to Ohmite 1000-ohm Variable Resistor Inside Valve Operator.Broken Lead Resoldered & Circuit Checked

ML20002B935
Person / Time
Site:	Cooper
Issue date:	11/20/1980
From:	Bednar L NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20002B934	List: 05000298/LER-1980-043, Forwards LER 80-043/03L-0 05000298/LER-1980-043-03, /03L-0:on 801021,motor Operated Valve SW-MO-89B Failed to Open.Caused by Broken Wire Connected to Ohmite 1000-ohm Variable Resistor Inside Valve Operator.Broken Lead Resoldered & Circuit Checked
References
LER-80-043-03L, LER-80-43-3L, NUDOCS 8101070353
Download: ML20002B935 (1)

LER-1980-043, /03L-0:on 801021,motor Operated Valve SW-MO-89B Failed to Open.Caused by Broken Wire Connected to Ohmite 1000-ohm Variable Resistor Inside Valve Operator.Broken Lead Resoldered & Circuit Checked

Event date:
Report date:
2981980043R03 - NRC Website

text

NRC. ACRM 366 U. S. NUCLEAR REGULATORY COMMISSION

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8 60 61 DOCKET NUMBER tW 69 EVENT D ATE 14 75 REPORT C ATE 80 EVENT DESCRIPTION AND PROBABLE CONSEOUENCES h lol:1 puring Surveillance Test, SP 6.3.20.1, motor operated valve SW-MO-89B failed to openp ioi3i [This valve is controlling flow when RHR service water pump 1B or ID is running.

l 10 6 41 l(T.S. 3.5.B.2) This event had no ef fect upon public health and safety.

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JJ 34 33 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 17 l o i lone of the 3 wires connected to a OHMITE 1000 ohm variable resistor counted inside l IiIi1 Ithe valve operatcr was broken. The broken lead was resoldered and the circuit check 1 ii,,i led. The valve was retested and its operation verified. Valve SW-MO-89A which is in I l i 131 I the second loop was also checked. The exact cause of the broken lead is not known. I lilal lThic f ailure in considered nno of a kind and uniaue.

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NAME OF PAEPARER PHONE-8101070353