ML19312B738
| ML19312B738 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 04/13/1970 |
| From: | Thies A DUKE POWER CO. |
| To: | Jennifer Davis NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19312B737 | List: |
| References | |
| NUDOCS 7911180057 | |
| Download: ML19312B738 (2) | |
Text
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Dunn Powen Co>tmxy
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Pow rH ntntotNO 94 4a2 Sotf rH CH U HCH STREET. CH AHIOT TE. N C.
April 13,1970 a c r,,, r.
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Mr. John G. Davis, Director U.S. Atomic Energy Commission Divn of Compliance Begion II - Suite 818 230 Peachtree Street, Northwest Ati,nta, Georgia 30303
Dear Mr. Davis:
I Your letter of March 16, 1970 requested our comments concerning the apparent deficiencies noted at the Bingham Pump Company during an inspection conducted December 0 - 11, 1969. In the same order as the four items listed in your letter, we have the following comments --
1]
The punip casin';s and radiographs were supplied to Hingham by the 1:SCO Corporation in Portland, Oregon. Qualified film analysts at both ESCO and Bingham reviewed and approved the radiographs. H&W's practice is to review 25"', of all casing radiographs plus one complete casing on each contract. The casing
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film examined during the inspection had received a 100% review by B&W analysts.
Thus, the film in question was approved by three S. N. T. qualified analysts.
We believe the film is adequate but have alerted the analysts to be especially ennerinne nr improper density on future reviews.
2]
As noted during your inspection, Casing No. 7 was not properly stamped and Eingham was informed of this at that time. The sharp stamp markings were removed by grinding and markings replaced with low stress stamps. Hingham has disposed of all sharp metal stamping dies in their shop and this has been confirmed by a B&W audit.
A check has also been made to verify that the remaining wall thickness is adequate for the casing design requirements.
3]
The discrepancy as noted in your letter was valid; however, the shafts in question were not used on the Oconee pumps due to a design change.
H&W - QA has examined the new shafting documentation and determined that furnace anneal heat treatment charts, UT inspection reports, PT inspection reports, chemical certifications, physical certifications and stabilisation heat treatment charts were provided. Both the furnace anneal and stabilization heat treatment charts identified
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the parts in the furnace.
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, &;hn G. Davis, Director April 13, 1970 j
.S. Atomic Energy Commission
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IKW has alerted Bingham to the importance of such documentation and has received assurance of more attention to these areas in the future.
4]
We share your concern over outside storage and in-process cicanliness of nucica r components. B&W'n purchane orders centain instructions regarding cleanliness requirements for critical equipment. All inaccessible areas are required to be cleaned prior to assembly and final cleaning requirements and acceptance standards stated.
IMW purchase orders do not place any special requirements on auppliers with regard to storage of materials while they await fabrication operations. Thorough cleaning of materials is required, however, prior to heating above roon. temperature.
Storage of massive stainless steel components to limit exposure to industrial con-taminants during all phases of fabrication is impractical and would require a radical l
change from current industrial practices.
l Hingham was advised of our concern in this area, both before and after your inspection. They have taken some steps to improve the situation; for example, the openings into interior areas are scaled with plastic and tape. We will continue to monitor this situation.
We believe there comments answer the concerns expressed in your letter.
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Yours very truly,
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A. C. Thies
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ACT/hr cc: Alrs W. II. Rowand - B&W Alr. W. L. IIallmark - Bingham Air. W. S. I,ce Alr. E. D. Powell Alr. C. E. Watkins
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