ML20116F591
| ML20116F591 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 10/11/1984 |
| From: | Llewellyn D AFFILIATION NOT ASSIGNED |
| To: | |
| References | |
| OL-I-168, NUDOCS 8505010143 | |
| Download: ML20116F591 (3) | |
Text
l
/63 E. u!!t
't,
,.v,-
INVESTXGATION/ RESOLUTION OF CONCERNS It 97 Pagefof2 CONCERN NUMBER:
9 ASSIGNED TO:
T. D. Mills COLD SPRINGING Statement of Concern One welder alleged during the initial interviews that a powerhouse mechanic foreman and several inspectors had allowed a' cold spring to occur on a piping reducer in the nuclear service water ("RN") system at weld 2RN-114-4, in September 1981.
TYPE OF CONCERN:
X FOUNDED UNFOUNDED Q-1A REQUIRED X YES NO Q-1A NUMBER 18304 Investigation To investigate this concern, further interviews were conducted with the foreman and three other members of his crew as well as the implicated welding inspector, the welding inspector leadman, the welding inspector's supervisor, and the authorized nuclear inspector ("ANI").
Significantly, all individuals interviewed who were directly involved stated that this instance of cold springing did occur on a 12" line.
All dire tly involved individuals (i.e.,
the crew members, foreman, and QC in spe -tor) felt that for this particular instance, the cold springing ' fell within the provision of QA Procedure M-4 and Welding Process Specification L-200 for alignment and was acceptable.
Upon evaluation, it was determined that the cold springing action was in violation of Construction Procedure CP-483. Accordingly, an NCI was generated on April 5, 1984.
I Significantly, of all the individuals interviewed, only two other individuals remembered other specific. instances of cold springing that could i
possibly be in violation of procedures. The other two instances were previously documented on NCI's and appropriately dispositioned.
In short, cold springing is not a common occurrence at Catawba.
Resolution Based on the interviews, there is no conclusive evidence that any other situations exist where cold springing was used and not properly evaluated.
It should be recognized that handling piping, especially of a large diameter, sometimes requires extensive rigging when hoisting and moving material into position, especially when valves or other concentrated weights are part,of the assembly.
Also, configurations which contain offsets ' and~ vertical risers create forces which must be overcome.
It is quite possible to see someone
. jacking or pulling pipe tg overcome these forces alone and suspect they were cold springing pipe when.n fact they were not.
It should also be noted that CP-483 does allow a force to be applied to piping in order to achieve fit-up.
This can amount to forces in excess of 1,000 lbs. on large diameter or heavy wall pipe.
8505010143 841011 PDR ADOCK 05000413 G
rF
.s r.
5 i f F lr : F
~
- E2
}
'3,{F FE
~
i r
=
P a-N.
t DOLKETED usnac s
a
'~%
P g @E
'85 APR 25 A1058 s
f
, '{ E c:
E
{ !! ~E EEM_'S 2 GFFICE OF SEL8tlAk # -
ya5 E U.
00CKETlHG & SERVICE a =5 BRANCH s
r-e
/
O k# $
h 4
- d h}ah
. s' s s D
f N
$si tii
?
I s
7 4
l.~
4ve-INVESTIGATION / RESOLUTION OF CONCERNS Item 27 Page 2 of 2 CONCERN NUMBER:
9 Resolution (continued)
As a result of the welder's concern, NCI 18304 was originated on April 5, 1984 to document the cold spring he had witnessed.
- However, Design Engineering's evaluation determined the cold spring to be insignificant from a safety standpoint.
As a conservative measure,
- however, prior to this engineering determination, the pipe was cut-out and the joint in question was refitted.
Action No additional technical action is required.
Conclusion The weld joint in question was reworked and now meets design requirements.
No other instances of uncorrected cold springing were identified. The impact of cold springing has been thoroughly discussed in previous testimony in the operating license proceeding for Catawba.
INVESTIGATION / RESOLUTION:
PERFORMED BY C O r v W DATE G 10 -9 4 DATE 8,/Ic
'/
REVIEWED BY f
J
,.--y
.___e-
.,9
_.-~em,_,.-_m_.-..n.
-,_-.w.
r-._,7