ML13308B449

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RO 77-13:on 770919,eddy Current Exams of Steam Generator Tubes Reveal Tubes W/Greater than 50% Wall Thinning & One Leaking Tube.Defective & Leaking Tubes to Be Plugged
ML13308B449
Person / Time
Site: San Onofre Southern California Edison icon.png
Issue date: 10/03/1977
From: Curran J
SOUTHERN CALIFORNIA EDISON CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
RO-77-13, NUDOCS 8103050931
Download: ML13308B449 (1)


Text

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  • ICENSEE EVENT REPORT (77-13)

CONTROL BLOCK:

[PLEASE PRINT ALL REQUIRED INFORMATION]

1 6

LICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE 1 ICL AIS I S1l 10101-1 010 101010 1-101 0l 1 4l 1111111 1011 7

8 9 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE ED CONTLLP_

LP_

i A5 1 01-1 01210 1I6 1 019 11 19 1717 V 1, vj 7 17 I 7

8 57 58

59.

60 61 68 69 74 75 80 EVENT DESCRIPTION I Eddy current examinations of steam generator tubes indicate there are 8I 7

8 9 80 03 Itubes in A steam generator; 7 tubes in B steam generator and 10 tubes 7

8 9 80 041 in C steam generator that have greater than 50% tube wall thinning. KSI 78B9 80 7 89One tube in A steam generator is leaking.

0 7

8 9 80 06 No. 77-13 1

7 B 9 PRIME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPUER MANUFACTURER VIOLATION I LCLJ C

IE JHI TIE IX I C1 4 1N WI 112O I0 N

_J 7

8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION 08 Westinghouse Steam Generator, Model 27.

Tube thinning at the antivibra 7

89 80 091 tion bars and above the tube sheet. All tubes with greater than 50%

7 8 9 80 1

I thinning indication :ori, leaking will be plugged.

1 7

89 80 FACILITY METHOD OF STATUS

% POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION G

[GJ 10101 01 1

NA

[Bj Eddy current of S/G-tubes I

7 8

9 10 12 13 44 45 46 80 FORM OF ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE LZ 1 L

NA I

NA 7

8 9

10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

[13 01l1o L2J I NA 1

7 8 9 11 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION 14I010 101 I NA 7

8 9 11 12 80 OFFSITE CONSEQUENCES 15 I NA 7

89 80 LOSS OR DAMAGE TO FACILITY TYPE ESCMTION 7

8 9 10 80 PUBLICITY 17 NA 7

8 9 80 ADQ T ONAL. FACTORS 18 I 7

8 9 80 Mi9INA 7 89 80 NAME:

J. M. CURRAN PHONE: (714) 492-7700 (03 O'

-AIGPO 881. 667