ML12034A166
| ML12034A166 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 01/31/2012 |
| From: | Westinghouse |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| CAW-12-3378 WBT-D-3753 NP | |
| Download: ML12034A166 (6) | |
Text
- ENCLOSURE 2 WATTS BAR NUCLEAR PLANT (WBN) UNIT 2 - INSTRUMENTATION AND CONTROLS STAFF INFORMATION REQUESTS WEC non-proprietary version of WBT-D-3753 NP-Enclosure, "Clarification of Dielectric Withstand Testing in Response to WNA-CN-00157-WBT Watts Bar 2," Dated January 2012
Page 1 of3 Westinghouse Non-Proprietary Class 3 WBT-D-3753 NP-Enclosure Clarification of Dielectric Withstand Testing in Response to WVNA-CN-00157-WBT Watts Bar 2 January 2012 Westinghouse Electric Company LLC 1000 Westinghouse Drive Cranberry Township, PA 16066
©2012 Westinghouse Electric Company LLC All Rights Reserved
Page 2 of 3 Westinghouse Non-Proprietary Class 3 A teleconference was held on December 8, 2011, between Westinghouse, TVA, and the NRC to discuss the Watts Bar Unit 2 incore instrumentation system. During the teleconference, clarification was requested regarding the 600V dielectric testing performed in response to an open item in Westinghouse calculation WNA-CN-00 157-WBT-P (Reference 1). The open item required dielectric withstanding voltage testing for the Incore Instrument Thimble Assembly (IITA) and interfacing []ac cable. The IITA was tested as a complete assembly as documented in Reference 2.
axc To summarize one of the key points of WNA-CN-00157-WBT-P, dielectric withstanding voltage testing of the IITA and the interfacing [
],C cable demonstrates that the maximum credible fault in the self-powered neutron detector MI cables will not propagate to the safety-related CET.
As described in WNA-CN-00157-WBT-P, dielectric withstanding voltage testing of the IITA was completed and is documented in Reference 2. Dielectric withstanding voltage testing of the interfacing [
]a.C cable has also been completed and documented in Reference 3.
References
- 1) WNA-CN-00157-WBT-P, Revision 1, "Watts Bar 2 Incore Instrument System (IIS) Signal Processing System (SPS) Isolation Requirements", (Westinghouse Proprietary Class 2),
November 2011.
- 2) Report Number 021-8559, "WINCISE Watts Bar IITA Dielectric Report", Rev. 00, Mirion Technologies Sensing Systems Division (IST Canada) Inc., November 2011.
- 3) LTR-ME-10-3, "Watts Bar 2 Incore Instrumentation System Dielectric Characteristics of Completed MI Cable Assemblies", (Westinghouse Proprietary Class 2), January 2010.
Page 3 of 3 Westinghouse Non-Proprietary Class 3 ac Figure 1 Incore Insrumentation System
ENCLOSURE3 WATTS BAR NUCLEAR PLANT (WBN) UNIT 2 - INSTRUMENTATION AND CONTROLS STAFF INFORMATION REQUESTS WEC non-proprietary document CWA-12-3378, "Application for Withholdings Information From Public Disclosure WBT-D-3753 P-Enclosure, 'Clarification of Dielectric Withstand Testing in Response to WNA-CN-00157-WBT,' (Proprietary)," Dated January 27, 2012
Westinghouse Westinghouse Electric Company Nuclear Services 1000 Westinghouse Drive Cranberry Township, Pennsylvania 16066 USA U.S. Nuclear Regulatory Commission Document Control Desk 11555 Rockville Pike Rockville, MD 20852 Direct tel:
Direct fax:
e-mail:
Proj letter:
(412) 374-4643 (724) 720-0754 greshaja@westinghouse.com WBT-D-3753 CAW-12-3378 January 27, 2012 APPLICATION FOR WITHHOLDING PROPRIETARY INFORMATION FROM PUBLIC DISCLOSURE
Subject:
WBT-D-3753 P-Enclosure, "Clarification of Dielectric Withstand Testing in Response to WNA-CN-00 157-WBT" (Proprietary)
The proprietary information for which withholding is being requested in the above-referenced report is further identified in Affidavit CAW-12-3378 signed by the owner of the proprietary information, Westinghouse Electric Company LLC. The affidavit, which accompanies this letter, sets forth the basis on which the information may be withheld from public disclosure by the Commission and addresses with specificity the considerations listed in paragraph (b)(4) of 10 CFR Section 2.3 90 of the Commission's regulations.
Accordingly, this letter authorizes the utilization of the accompanying affidavit by Tennessee Valley Authority.
Correspondence with respect to the proprietary aspects of the application for withholding or the Westinghouse affidavit should reference this letter, CAW-12-3378, and should be addressed to J. A. Gresham, Manager, Regulatory Compliance, Westinghouse Electric Company, Suite 428, 1000 Westinghouse Drive, Cranberry Township, Pennsylvania 16066.
Very truly yours, JA.A. Gresham, Manager Regulatory Compliance Enclosures