05000346/LER-1981-014-03, /03X-1:on 810226,decay Heat Valve 64 Would Not Open During Testable ECCS Valves Quarterly Test.Caused by Loose Set Rod Bushing,Allowing Gear Box Set Rod to Move Which Unlocked Limit Switches from Adjusted Position

/03X-1:on 810226,decay Heat Valve 64 Would Not Open During Testable ECCS Valves Quarterly Test.Caused by Loose Set Rod Bushing,Allowing Gear Box Set Rod to Move Which Unlocked Limit Switches from Adjusted Position

ML20009D621
Person / Time
Site:	Davis Besse
Issue date:	07/13/1981
From:	Matheny D TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009D616	List: 05000346/LER-1981-014, Forwards LER 81-014/03X-1 05000346/LER-1981-014-03, /03X-1:on 810226,decay Heat Valve 64 Would Not Open During Testable ECCS Valves Quarterly Test.Caused by Loose Set Rod Bushing,Allowing Gear Box Set Rod to Move Which Unlocked Limit Switches from Adjusted Position
References
LER-81-014-03X, LER-81-14-3X, NUDOCS 8107240225
Download: ML20009D621 (1)

LER-1981-014, /03X-1:on 810226,decay Heat Valve 64 Would Not Open During Testable ECCS Valves Quarterly Test.Caused by Loose Set Rod Bushing,Allowing Gear Box Set Rod to Move Which Unlocked Limit Switches from Adjusted Position

Event date:
Report date:
3461981014R03 - NRC Website

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10121 l(NP-33-R1-10 On 2/26/81 at 1930 hours0.0223 days <br />0.536 hours <br />0.00319 weeks <br />7.34365e-4 months <br /> durine the nerformance of the Testable Emer-l Io l3l Igency Core Cooling Systen (ECCS) Valves Quarterly Test, operators determined that DH 64l I o i 4 I lwould not open.

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33 3o 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h litollThe cause is due to an error in the installation of the set rod bushing. The loose sett i i l rod bushing allowed the near box set rod to move which unlocked the limit ssitches frorf i 7 ltheir adjusted position. The final result was the torquing out of DH 64.

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