ML20010H336
| ML20010H336 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley, Millstone |
| Issue date: | 09/02/1981 |
| From: | Keimig R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Carey J DUQUESNE LIGHT CO. |
| Shared Package | |
| ML20010H337 | List: |
| References | |
| NUDOCS 8109240357 | |
| Download: ML20010H336 (3) | |
See also: IR 05000334/1980017
Text
{{#Wiki_filter:_ ., 1 %* ( * ,. i SEP 0 21981
Docket No. 50-334 g %K [[g, /, '3 Duquesne Light Company [ . ATTN: Mr. J.J. Carey Cy4 ! Vice President @6 <0) 2/ A 7g Nuclear Division 7 I kpf P.O. Box 4 8 Shippingport, Pennsylvania 15077 N , y < Gentlemen: 'k j Subject: Investigation No. 50-334/80-17 This refers to the investigation conducted by Messrs. R.f Christopher and W.F. Sanders of this office from June 3 through December 4,1980 regarding welding deficiencies in field fabricated storage tanks and the apparent duplication of several radiographs of the containment liner welding at the Beaver Valley Power Station, Unit 1. These matters, which pertain to che original construction of the facility, were reported to the NRC by the Duquesne Light Company in Licensee Event Repcrts Nos. 80-025 and 80-037 and the follow-up report dated July 14, 1980. Specific areas examined during this investigatien are described in the Office of Inspection and Enforcement Investigation Report which is enclosed with this letter. This investigation disclosed the following facts: 1. Water storage tanks designed and classified as Seismic Category 1 com- ponents were' field constructed by Graver Tank and Manufacturing Company (Graver) with the nozzles attached by seal welding although engineering requirements specified full penetration welds. The quality control and erection documentation show appropriate inspector signatures attesting to the verification that full penetration welding had been performed. 2. Three sets of radiegraphs taken of welds in the containment liner were found to be duplicates Ithough the two radi aphs in each set had R1:bi EkI R DETI R1 & R1:D I RI:DETI 4 C rlppp Kei. Christopher /wb Sanders ipp 4 8/27/81 F/d/#/ $ i f/ %f;;;,0l OFFICIAL' RECORD C S lb Purag
1 . Ouquesne Light Company 2 i different weld number identification, the images were identical and were verified by comparing the anomalies in each of the welds and superimposing one film with another. 3. Your Architect-Engineer / Constructor, Stone and Webster Engineering Carporation, who had overall responsibility for the quality control program, limited the second level quality control activities for Graver to quarterly audits which primarily focused on paper work (procedures and records). The rationale for not performing second , level QC surveillance of Graver by Stone and Webster or Duquesne Light I Company was apparently the result of an attitude at the time that Graver and its personnel were the experts in tank construction and were the best suited to monitor their own work. Our concerns regarding welding performed by Graver at the Beaver Valley Unit 1 facility have been addressed by the Duquesne Light Company, repairs made where necessary to meet applicable codes and specifications, and the integrity of these welds established through your reviews, corrective actions and subsequent nondestructive examinations. We have completed our review of these matters and have no further concerns about the Graver on- site work on either the tanks or containment liner. It is recognized that the nonconformances referred to above and discussed in the enclosed report occurred during the 1971-1973 timeframe and that Duquesne Light Company has enhanced their quality assurance program since that time. We do not consider these facts to diminish completely the significance of the investigation findings, particulary in view of the apparent absence of QA/QC overview of the Graver work by Duquesne Light Company. We recognize that our past cor<struction inspection program at Beaver Valley Unit I and our on going inspection program at Beaver Valley Unit 2 have continued to examine this area. Any specific findings, problems and enforcement actions, as necessary, identified through those efforts have been and/or will be handled separately from this investigation. In accordar.ce with 10 CFR 2.790 of the Commission's regulations, a copy of this letter and the enclosed investigation report will be placed in the NRC's Public Document Room. If this report contains any information that you (or your contractors) believe to be exempt from disclosure under 10 CFR.9.5(a)(4), it is necessary that you (a) notify this office by telephone within ten (10) dayc from the date of this letter of your intention to file a request for withholding; and (b) submit within 25 days from the date of this letter a written application to this office to withhold such information. Consistent with section 2.790(b)(1), any such application must be accompanied by an affidavit executed by the owner of the information which identifies the document or part sought to be withheld, and which contains a full statement of the reasons on the basis which it is claimed that' the information should be withheld from public disclosure. This section further requires the OFFICIAL RECORD COPY. _ _ _ _ _ _ _ - _ - _ _ _ _ _ - _ - _ _ _ - _ _ _ _ _ _ _ _ _ _
m , .. Duquesne Light Company 3 statement to address with specificity the considerations listed in 10 CFR 2.790(b)(4). The information sought to be withheld shall be incorporated as far as possible into a separate part of the affidavit. If we do not hear from you in this regard within the specified periods noted above, the i report will be placed in the Public Document Room. The telephone notification of your intent to request withholding, or any request for an extension of the 10 day period which you believe necessary, should be made to the Supervisor, Files, Mail and Records, USNRC Region I, at (215) 337-5223. Should you have any questions concerning this investigation, we will be pleased to discuss them with you. Sincerely, - l lM R.R. Keimig, Chief, Projects Branch No. 2, Division of Resident and Project In.spection Enclosure: Office of Inspection and Enforcement Investir. tion Report Number 50-334/80-17 cc w/eral: F. Biss w t, Manager, Nuclear Support Services R. Washabaugh, <n .knager Station Superintendent General Superintendent, Power Stations Department R. Martin, Nuclear Engineer J. Sieber, Manager, Nuclear Safety and Licensing T. D. Jones, Manager, Nuclear Operations R. M. Mafrice, Nuclear Engineer N. R. Tonet, Manager, Nuclear Engineering Public Document Room (POR) Local Public Document Room (LPDR) Nuclear Safety Information Center (NSIC) NRC Resident Inspector Commonwealth of Pennsyvlania cc w/o enc 1: W.G. Counsil, Senior Vice President, Nuclear Engineering and Operations Group, Northeast Nuclear Energy Company bec w/ encl: Region I Docket Room (with concurrences) Dudley Thompson, Director, E&I, HQ OFFICIAL RECORD COPY }}