ML18142B249

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LER 1976-024-00 for R. E. Ginna, Unit 1, Accumulation of Borated Water Near Valve in Safety Injection System Piping Between Boric Acid Tanks and Safety Injection Pumps
ML18142B249
Person / Time
Site: Ginna Constellation icon.png
Issue date: 10/22/1976
From: Curtis A E, Platt C E
Rochester Gas & Electric Corp
To:
Office of Nuclear Reactor Regulation
References
LER 1976-024-00
Download: ML18142B249 (6)


Text

II CONTROL BLOCK: LER 76-24/1T LICENSEE EVENT REPOR (PLMSE PRINT ALL REQUIRED INFORI'JPATIDN)

UCENSEE NAME~01 N Y R E 7 89 CATEGORY~01 CON'T~7 8 57 58 G 1 0 14 15 REPORT AEPOAT 59 60 LICENSE NUMBER 0-0 0 0 0 0-0 0 UCENSE TYPE EVENT TYPE 4 1 1 1 1~01 25 26 30 31 32 DOCKET NUMBER EVENT DATE AEPORT DATE 0 5 0-0 2 4 4 1 0 0 8 7 6 1 0'2 2 7 6 61 68 69 74 75 80 EVENT DESCRIPTION During normal operations an auxiliary operator found an accumulation of borated water 80 7 89~I Safety Injection Pumps.Further investigation revealed a leak in a section of 8" 7 8 9 80 m Schedule 10 stainless steel pipe between valves 826A and 826B.The PORC recommend-7 8 9 80 tOpg ed taking the unit to cold shutdown.Leaks were found (cont'd.on attached sheet)80 7 8 9 PA0ME SYSTEM CAUSE COMPONENT CODE CODE COMPONENT CODE VIOIATION~a~~SF Z I I I Z X X N 7 8 9 10 11 12 17 43 44 47 CAUSE DESCRIPTION Qgg As a result of metallurgical analysis and metallographic examinations, chloride stress COMPONENT MANUFACTURER K 0 5 5 48 7 8 9 80 Qpg corrosion cracking is believed to be the cause of the leaks.Since this investigation 80 7 8 9~10 is continuing, further information will be submitted in a supplemental report.7 8 9 80 m near a valve in the Safety Injection System piping between the Boric Acid Tanks and 7 8 7 8 Q~g 7 8~13 7 8 7 8 OTHEA STATUS AMOUNT OF ACTIVITY NA OFFSITE CONSEQUENCES 9 FACIUTY 9 10 12 13 FORM OF ACTIVITY COATENT RELEASED OF RELEASE~S H 9 10 11 PERSONNEL EXPOSURES 9 11 12 13 PERSONNEL INJURIES 9 11 12 METHOD OF DISCOVERY DISCOVERY DESCRIPTION b By operator 44 45 46 LOCATION OF RELEASE NA 44 45 80 80 80 80 80 Press release on October 8, 1976 ADDITIONAL FACTORS NA 7 89'g NA 7 89 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION L See Event Description 7 89 10 PU8LICITY 7 89 80 80 80 7 89 , NAME C.E.Platt A.E.Curtis, III 80 PHDNEI 7 16/546-2700, ext.29 1-250 cpa ee1-eev

~(/~io 4 Licensee Event Report Reportable Occurrence 50-244/76-24 Event Descri tion (cont'd.)in two sections of pipe, and liquid penetrant and ultrasonic examination of 75 welds and the piping associated with those welds revealed five other sections of pipe or fittings with indications.

All seven of these components of the piping system containing leaks or indications were replaced.

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