ML20077N442
| ML20077N442 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 09/01/1983 |
| From: | Tucker H DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, SD-83-09, SD-83-9, NUDOCS 8309130098 | |
| Download: ML20077N442 (4) | |
Text
.
,o USNRC prn,et DlfEE POWER IPANY P.O.'IM)x 5318'Ii "
l CHAHLOTTI!, N.C. 28242 IIAL IL TUCKEH TELEPIEONE 83 SEP 9 Pl:
US4 **"
September 1,0 9 1983 Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303 Re: Catawba Nuclear Station Units 1 and 2 Docket No. 50-413 and 50-414
Dear Mr. O'Reilly:
Pursuant to 10 CFR 50.55e, please find attached Significant Deficiency Report SD 413-414/83-09.
Very truly yours, e
(
s
/
Hal B. Tucker RWO/php Attachment cc: Director INPO Records Center Office of Inspection and Enforcement Suite 1500 U. S. Nuclear Regulatory Commission 1100 Circle 75 Parkway Washington, D. C. 20555 Atlanta, Georgia 30339 NRC Resident Inspector-Mr. Robert; Guild, Esq.
Catawba Nuclear Station Attorney-at-Law P. O. Box 12097 Palmetto Alliance Charleston, South Carolina 29412 213515 Devine Street Columbia, South Carolina 29205
{pygnALCOPY g/ f EGO 913OO98 830901 PDR ADGCK 05000413 l
5 PDR
CATAWBA NUCLEAR STATION REPORT NUMBER: SD 413-414/83-09 REPORT DATE: September 1, 1983 FACILITY:
Catawba Nuclear Station Units 1 & 2 IDENTIFICATION OF DEFICIENCY:
Swing check valves supplied by Borg-Warner Corporation have a tack weld in the stud and disc assembly joint. The tack weld needs to be replaced with fillet weld.
INITIAL REPORT:
On August 5, 1983 V. Brownlee, NRC Region il was notified of the subject deficiency by L. M. Coggins and J. K. Berry of Duke Power Company, 422 S. Church Street, Charlotte, NC 28242.
COMPONENT AND/0R SUPPLIER:
Attachment I identifies the Duke item Number, Tag Number and Borg-Warner Part Number for the swing check valves involved. The valves were manufactured by Borg-Warner Corporation, Nuclear Valve Division.
DESCRIPTION OF DEFICIENCY:
Borg-Warner has indicated to the NRC and to Duke there is a possible hardware problem with swing check valves supplied to Duke. Valves having a tack weld in the disc and stud assembly joint could possibly fall.
Failure of deficient weld could cause the disc to become detached precluding the intended safety function and the resulting detached parts possibly damaging downstream equipment.
l ANALYSIS OF SAFETY IMPLICATIONS:
Loss of disc in valves shown on Attachment I in the Auxiliary Feedwater System l
(CA) could block' flow causing insufficient auxiliary feedwater flow to steam generators.
l Loss of disc in valves INS 098 and INS 099 could block flow through their respective containment spray flow paths.
This would be a loss of either A or B train spray fIow.
Safety implications associated with valve INV482 is loss of reciprocating charging pump in the Chemical and Volume Control System.
i
~_
-, - _ _ _ _ _ _ - - _ _. - ~ _.
Corrective Action:
The valves will'be repaired by Borg-Warner in accordance with Borg-Warner repair procedures. All valves will be repaired by November 30, 1983
. This problem is being reviewed at other Duke Nuclear Stations and will be reported if a safety significance is identified.
t e
,,., - - +
-.,,,---,-r,----,-w-
,n-,
y,.
ATTACHMENT I 1
CHECK VALVES Duke item Size Duke Tag Number Valve Serial Number j
6H-203 4"
ICA049 22442 6H-203 4"
ICA065 22443 6H-203 4"-
ICA037 22444 6H-203 4"
1CA053 22445 GH-703 4"
2CA065 22446 6H-203 4"
2CA053 22447 6H-203 4"
2CA037 22448 6H-203 4"
2CA049 22449 i
90-217 8"
1NS098 11716 9D-217 8"
1NSO99 11717 4D-208 4"-
.1NV482 11657 2B-238 6"
2CA172 11707 2B-238 6"
ICA171 11708 2
4 f
4 e-
- w...-w-%
sme-
.cr w-c-y-em,m.,sy e-_e, y-r y
, n y--..
c.
-.v-#,-
,9,