ML20114E745
| ML20114E745 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 03/13/1979 |
| From: | Taylor J BABCOCK & WILCOX CO. |
| To: | Reinmuth W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| Shared Package | |
| ML19246B317 | List: |
| References | |
| NUDOCS 7907130175 | |
| Download: ML20114E745 (2) | |
Text
.
s-:s.
Babcock &Wilcox 4
P.O. Som 1260. Lyncheurs. Va. 24505 Telephone (804)384 5111 March 13, 1979 Mr. Wayne G. Reinmuth Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Response to IE Bulletin Nos. 78-12 and 78-12A
Dear Mr. Reinmuth:
Enclosed for your information are three (3) copies of our roport entitled, " Records Investigation Report Related to Off-Chemistry Welds in Material Surveillance Specimens and i
l Responses to Bulletin 78-12 and 78-12A Supplement", which we have prepared fer cur cu:temcrs in ordcr to facilitate their responses to the bulletins.
The report is basically divided into three (3) parts: (1) an introduction and summary of the wald wire issue; (2) general information to support the con-clusions we have reached; and (3) specific responses to the information requested by the bulletins.
Appendices containing copies of B6W chemical analysis requirements and weld filler wire qualification tests are included as supporting information.
The information in the appendices has been selected based on 1
l y;ur request at a January 16, 1979 meeting in Mt. Vernon, Indiana.
j This report describes the investigations that were made os a result of discovering an off-chemistry condition in a roactor vessel surveillance specimen for the Crystal River 3 (CR-3) i Project.
The purpose of the records investigation was to determine the cause and extent of the mixed weld wire problem.
The investigation also included a review of test results from cetual reactor vessel production weld seams to the extent these walds could be investigated, and from reactor vessel surveillance caterial tests.
The investigation covered the period from 1966 through November 1978.
In accordance with IE Bulletin.78-12A, cur response is given on a generic basis and no attempt was made to correlate specific weldsents with heats of filler wire.
l
~
49071s offf The Behesch & Wileen Comoony i Estaehshed 1867
n mgygeax 1
2 Mr. Wayne G. Reinmuth March 13, 1979 The records investigation provides considerable support for tho hypothesis that the presence of atypical chemistry condition in the Crystal River 3 surveillance block is an isolated event involving a small amount of material in one heat of wire.
The general conclusion reached as a result of the inves'ti-gation of the atypical weld wire discovery is that it is very unlikely that other similar conditions exist in any reactor prossure vessel welds.
Furthermore, the shop practices which havo evolved over the years and which are currently in effect virtually eliminate the possibility that a vessel fabricated t0dny might contain off-chemistry weld materials.
If you have any questions concerning the enclosed material, ploose contact me (Ext. 2817) or William R. Speight (Ext. 2902) af my staff.
l t
Very truly yours i
1 James H. Taylor Manager, Licensing JHT/fw cc:
R. B. Borsum - B4W Rep. Bethesda Office
Enclosures:
As stated i
t 8
4 6
~
,,,,-------,..-,,,-,,---,--v-c-
. -. -,,a
- - -, -, + - -,, - - -, - - - -,.