ML13308B498
| ML13308B498 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/04/1976 |
| From: | Mills G, Ottoson H SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| NUDOCS 8103060568 | |
| Download: ML13308B498 (4) | |
Text
LICENSEE EVENT REPORT CO-ITROL BLOCK:
LASE PRINT ALL REQUIRED INFORMATION) 6 LICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE
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[C JA IS 01i I I 01 0 -olb 10 0 010 o- 0 0 1411 11 1111 1011 7
89 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE M01CON'T [D I
[TJ L
1 01 51 01-0 12 10 l6 j1 01 51 01 31 71 61 1 01 51 01 41 71 61 7
8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION Magnetic Particle Inspection of the spent fuel cask Rectangular Coupling 7
8 9 Device noted the following indications: (a) Linear cracks in the welds and parent so 063 [ metal adjacent to the welds (heat affected zone), (b) Slag pockets and bridged areasj 7
8 9 were found in the weld after surface grinding, (c) Laminar indications have been 8o 7I 8 9 xnnpsd in the side plates of the coupling device in the area of the weld.
7 8
A new Rectangular Coupling Device was manufactured to replace the original 8o E9 I onp The new dvice was manufactured and welded using certified (1) materials.
I 7
8 9 (2) welders, (3) welding procedures and-operations and (4) nondestructive 6o 7
I t;ting technique 7
8 PRIME
.80.
SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLIER MANUFACTURER VIOLATION 0 L1..t 1.1 X XI X I1 X1 Xl Li J N 12 10 1 5 1
[Nj 7
8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION 08 L Destructive and nondestructive testing of the Rectangular Coupling Device indicated 7
8 9 80 use of improper welding techniques and procedures, and failure to comply with 7
8 9 8
1 0
- original material specifications.
7 8 9 FACILITY METHOD OF 80 STATUS
% POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION Ej 11 01 0 1
NA IIbl Mgei 11 [i Iho t
[
~J LJ IMagnetic Particle (dry)I 7
8 9
10 12 13 44 45 46 FORM OF ACTIVITY COcTENTe RELEASED OF RELEA SE AMOUNT OF ACTIVITY LOCATION OF RELEASE I I L.zJ
[I AiNA I
NAI 78 9
10 11 44 45
.80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 1-10 INAI 789 11 12 13 80 PERSONNEL INJURIES NUIBED DESSRIPTIONSV DSPO 14 0 lo 0[
NA 7
8 9 11 12 B0 OFFSITE CONSEQUENCES 151 NA 7
8 9 80 ELOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION 11[
I NA 7
8 9 10 1
80 PUBLICITY MW I Lcnee released to standard publicity list.
7 89
.80 ADDITIONAL FACTORS SI1oNNAfN 7
8 9 80 59 NA 7
8 9 80 NAE:H.
L. Ottoson/G. R. Mills 714-492-7700 ADDITIPHONE:ONALFA GPO 8819667
A.
TOP VEW CRACKS IN WELD 10"1....
CRACKS IN HEAT AFFECTED ZONE 1/2" 11 1/2"1 B. BOTTOM VIEW 2"
APPARENT LACK OF FUSION IN A PORTION T
10 C. SIDE VIEW 7 1/2" BLOCK A CRACKS IN WELD SIDE 1 CRACKS IN HEAT AFFECTED ZONE FIGURE I CRACKS IN WELDS OF THE ORIGINAL RECTANGULAR COUPLING DEVICE
HOLE FOR CONNECTING PIN 3 15/16" 5 1/8" 46" 37" 7 1/2" WELD (TYPIC 1/2" LEGS 1/2" 5"
ISIDE 2
SIDE 1 4" 11 2"
BLOCK A HOLE FOR EXTENSION SHAFT FIGURE II DETAIL OF THE NEW RECTANGULAR COUPLING DEVICE
.UNITED STATES NUCLEAR REGULATORY COMMISSION REGION V SUITE 202. WALNUT CREEK PLAZA 1990 N. CALIFORNIA BOULEVARD WALNUT CREEK. CALIFORNIA 94596 50-20 G. W. Roy, Chief, Field Support and Coordination Branch Office of Inspection and Enforcement, Headquarters REPORTABLE OCCURRENCE The attached 24-hour noticeof a reportable occurrence was submitted by the following licensee:
Southern California Edison Company, San Onofre Unit 1, Docket No. r$ 0 td May 4, 1976.
.(L.
Crews, Chief ea tor Operations and Nuclear Support Branch
Enclosure:
As Stated cc w/encl.
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