ML19210B442
| ML19210B442 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/26/1973 |
| From: | John Miller Metropolitan Edison Co |
| To: | Knuth D US Atomic Energy Commission (AEC) |
| Shared Package | |
| ML19210B441 | List: |
| References | |
| NUDOCS 7911080663 | |
| Download: ML19210B442 (2) | |
Text
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POST OFFICE BOX 542 READING, PENNSYLVANI A 19003 TELEPHONE 215 - 923 3601 September 26, 1973 Dr. D. F Knuth t
Directorate of Regulatory Operations United States Atomic Energy Commission Washington, D. C.
20545
Dear Dr. Knuth:
Subject:
Three Mile Island Nuclear Station Units 1 and 2 Estimated Chemical Analyses Docket Nos. 50-289 and 50-320 You were notified on August 27, 1973 of a situation which could be considered reportable under 10CFR50.55(e)(1)(1), " Conditions of Construction Permits". This situation involved incomplete chemical analyses perfor=ed by Walworth/Aloyco Qompany on pressure boundary parts of stainless steel valves supplied for use on Three Mile Island.
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On August 29, 1973 the AEC/DRO Region I office conducted an inspec-tion of the Walworth/Algyco plant, and on September 14, 1973 cited Matropoli-tan Edison Company for violation of the ASTM requirements.
Description of Incident Cast pressure boundary parts for nuclear stainless steel valves were required to be produced and tested in accordance with the requirements of ASTM A-351. A GPU Service Corporation Quality Assurance audit of Walworth/Aloyco's foundry in Elizabeth, New Jersey, revealed that the vendor had not fully com-plied with ASTM A-351 testing requirements.
In lieu of testing for and report-ing actual percentages of phosphorus and sulfur in each heat of ASTM A-351 pro-duced for castings, the vendor's practice was to report estimated values of these elements. There are 197 heats of =aterial involved for Unit 1 procured by Bab-cock & Wilcox and Metropolitan Edison.
For Unit 2 there are 40 heats of material involved in valves procured by Babcock & Wilcox.
Corrective Action Metropolitan Edison Company has requested Walworth/Aloyco to locate archive samples representing heats provided for Three Mile Island from the Aloyco foundry. Walworth/Aloyco has found 130 out of 197 heats of material for Unit 1 and 34 out of 40 heats of material for Unit 2.
These heats of material represent castings for bodies, bonnets and discs.
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Dr. D. f. P.nuth Septe=ber 26, 1973 uirectorate of Regulatory Operations U. S. Atemic Energy Co=sission Washington, D. C.
20545 Metropolitan Edison and Babcock & Wilcox have directed Walworth/
Aloyco to test or have tested the archive sa ples for actual values of sulfur and phosphorus content in order to evaluate those particular heats and estab-lish a level of confidence which will assist in determining the manner that Metropolitan Edison will' employ in accepting the balance of material heats and related valves for which there are no samples availabic. Walworth/Aloyco was also instructed to furnish the data identifying those values to which trace-ability to the tested specimens can be assigned.
The testing and procedures shall be in accordance with AST:I E-353 and E-350 requirements.
A portion of the testing will be witnessed by one metallurgist from Gilbert Associates, Inc.,
and a Quality Assurance representative from both the Metropolitad Edison and Babcock & Wilcox companies.
Preventative Measures Walworth/Aloyco instituted corrective steps i==ediately after GPU Service Corporation brought this situation to their attention.
On February 20, 1973, they had replaced the tungsten tube in the spectrographic analytical equip-ment with a filtered chrome tube.
This tube has the capability of measuring sul-fur and phosphorus.
Your inspector reviewed the operation and results of the Aloyco spectrographic analytical equipment on August 29, 1973.
Results of the analysis of the archive samples is estimated for com-pletion by October 5, 1973.
Final disposition of the acceptability of the Wal-worth /Aloyco valves, based on available test reports, is estimated to be com-pleted by October 15, 1973. You will be infor=cd of the results of the archive samples and i:he disposition of the valves.
These results will be available at the Three Mile Island site for your review.
O Very truly yours,.
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