ML17272A398

Reportable Deficiency on 781017:defective Terminals Found on Westinghouse-supplied Electrical Penetrations X105 A,B,C & D.Defect Consisted of Wrong Size Lugs Resulting in Loose Connections.Incorrect Size Lugs Removed & Replaced

ML17272A398
Person / Time
Site:	Columbia
Issue date:	04/17/1979
From:	WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:
Shared Package
ML17272A397	List: ML17272A396 ML17272A398
References
10CFR-050.55E, 10CFR-50.55E, GO2-79-68, NUDOCS 7904270392
Download: ML17272A398 (2)

Text

REPORTABLE DEF<CIEHCY AHD CORRECTIVE ACTION WPPSS HUCLEAR PROJECT HO. 2 DEFECTIVE 'TERllIHATIOHS OH ELECTRICAL PEHETRATIOHS

'WASHIHGTOH PUBLIC POWER SUP. LY SYSTEH DOCKET HO. 50-397 L ICEHSE HO. CPPR-93 Descri tion of Deficienc i

Defective terminations v(ere found on Westinghouse supplied electrical penetrations 905 A, 8, C and D. The de ect consisted of inboard and outboard crimp connections using ihe wrong size lugs, resul: ng n loose connections and some lugs having fallen off. The deficiency was first noted on October 17, 1978 and documented at that time by a Honconformance Report. On March 19, 1979, it was concluded that the deficiency was a reportable 10CFR50.55(e') condition and so reported to Region V of the HRC.

Anal sis of Safet Im lications The subject penetrations carry control and indication signals for the olloqing systems: reactor protection, low pressure core spray, high pressure core spray, automatic depressurization and residual heat removal. It is conceivable that an open or shorted circuit could have occurred, resulting in an impaired condition of one or more of the sa ety-related systems, e.g., failure to initiate a scram input signal from main steam isolation valves or 1'oss of automatic de-pressurization valve control. ~

Corrective Action Taken

.he penetration mod'es having incorrect size lugs were removed under Westinghouse direction. They we'e shipped to a factory for lug replacement under quality controlled conditions. The correct lugs have been installed and ar'e presently a;uai ting shipment back to the site. The modules wi11 be reinstalled under ~r(estinghouse control.

The subject defect is specific in nature, i.e., not generic. Incorrect size lugs were installed on connections. Other facilities affected, if any, are therefore not known.

All other appropriate penetrations were inspected. One additional, non-safety related penetration had similar proolems. It was corrected in the manner discussed above.

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