ML20024C014

Updated LER 81-080/03X-1:on 811116,discovered Weep from Cracked Weld on Spent Fuel Cooling Pump Discharge Vent Line 12.Caused by Inadequate Support of Vent Line.Support Assembly installed.W/830622 Ltr

ML20024C014
Person / Time
Site:	Calvert Cliffs
Issue date:	06/22/1983
From:	Farrell E, Lagiewski J, Russell L BALTIMORE GAS & ELECTRIC CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-81-080-03X, LER-81-80-3X, NUDOCS 8307120144
Download: ML20024C014 (3)

Text

I I NRC FORM 366 U.S. NUCLE AR REGULATO?.Y COMMISSION (7 77) - N LICENSEE EVENT REPORT UPDATE REPORT . -

PREVIOUS REPORT DATE: 12-16-81 CONTROL BLOCK: l 1

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DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l o 121 l At 1220. during normal operation, the plant operator discovered a weep l lo l3 l l from a cracked weld on #12 Spent Fuel Cooling Pump discharge vent line l o 4 l (T.S. 6.9.1.9.d). The pump was immediately removed from service and the l ITTT1I leak isolated. Unit 2 was at 100% power. I O 6 l Similar events: none. l o 7 I I l 0 la l ! '

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33 34 3b 36 3/ 40 41 42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h fYlTI I Insnection of the oicine revealed a small linear indication on the dis- I li li l I charee header near the vent line connection. The indication was removed I i 2 l and the line weld repaired. The cause of the indication was determined l 1 3 l to be inadequate support of the vent line. A support assembly has been l installed on the vent line. l lil4l 1 7 8 9 80 ST S  % POWER OTHER ST ATUS Dis O RY DISCOVERY DESCRIPTION l @ W @ lIl0l0l@l N/A l' [A_j@l Operator Observation l ACTIVITY CO TENT #

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'NAME OF PREPARER J. S. Laniewski/E. V. varrell PHONE: 301-269-4747/4504 {

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LER NO. 81-80/3X, Rev. 1 DOCKET NO. 50-317 LICENSE NO. DPR 53 EVENT DATE 11-16-81 REPORT DATE ATTACHMENT CAUSE DESCRIPTION AND CORRECTTVE ACTIONS (CONT'D)

At 1220, during normal operation, the plant operator discovered a weep which appeared to be coming from a cracked weld at No. 12 Spent Fuel Cooling Pump discharge vent line's connection with the discharge header. The pump was immediately removed from service and the leak isolated. Inspection of the piping revealed a small linear indication on the discharge header, approx-imately 1" away from the' discharge vent line connection. The indication was removed and the line weld repaired. The site passed both radiographical examination and hydrostatic testing.

The cause of the indication was determined to be inadequate support of the vent line. During normal operation the discharge header experiences inherent vibration. This vibration was transmitted to the unsupported vent line causing movement relative to the discharge header. This resulted in the linear indication on the. discharge header. To prevent the recurrence of this in the future, a support assembly has been installed on the vent line.

This will eliminate vent line movement relative to the discharge header.

B ALTIMORE G AS AND ELECTRIC COMPANY P. O. D O X 1475 B ALTIMO R E. M A R Y L A N D 21203 NUCLEAR POWER DEPARTMENT CALVERT CLIF F5 NUCLE AR power PL AN T LUSBY, M ARYL AND 20657 June 22, 1983 Dr. Thomas Murley Docket No. 50-317 Regional Administrator License No. DPR 53 U.S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406

Dear Dr. Murley:

In accordance with Technical Specification 6.9 please find the attached update report for LER 81-80/3X, Revision 1.

Should you have any questions regarding this report, we would be pleased to discuss them with you.

Very truly yours, m

L. B. Russell Plant Superintendent LBR:EVF:mlk cc: Director, Office of Management Information and Program Control Messrs: A. E. Lundvall, Jr.

J. A. Tiernan 1

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