ML20031C374

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RO 77-49:on 771216,leak at One Drop Per Second Noted at pipe-to-valve Butt Weld on 3/4-inch Pressure Alarm Ref Line in Control Rod Drive Suction Piping Sys Inside Containment. Caused by Vibration in Positive Displacement Pump Sys
ML20031C374
Person / Time
Site: Big Rock Point File:Consumers Energy icon.png
Issue date: 01/13/1978
From:
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20031C371 List:
References
RO-77-49, NUDOCS 8110070095
Download: ML20031C374 (1)


Text

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- om arevem I 1121116 I 717 l 1 111-! 1-1: 1 7 e s7 t.s as so 61 6a 6a 74 7s bo tven esscas nw (77-+'f) g lDuring routine equipment inspection, a leak of one drop per second was noted at a l

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@ lei e-to-valve butt veld on a 3/4" pressure alarm reference line in the control red l

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@ l drive suction eipine system inside containment. T1e pinine was braced on 12/17/77 tol 7 89 60 Q l reduce stress and cla= ped and sealed to stop leakage on 12/23/77.

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Iz I al 9I9i L'<.J ou 7 e a 10 11 12 17 43 44 47 4a CAUSE CESCRPTCN is l Probable cause is due to vibration in the positive displace:ent pu=p system. Repair l 7 89 La

@ lof the veld is planned during the next scheduled shutdown and use of flexible tubine l 7 89 g3

'@ l to the 1.strument is beine censidered to prevent recurrence. Re~ertnSHitv4 Centd) l 7 as

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