ML110770537

Instrumentation and Controls Staff Information Requests

ML110770537
Person / Time
Site:	Watts Bar
Issue date:	03/16/2011
From:	Stinson D Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML110770537 (6)

Text

Attachments 1 and 4 are to be withheld from public disclosure under 10 CFR 2.390.

When separated from these attachments, this letter is decontrolled.

Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000 March 16, 2011 10 CFR 50.4 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Unit 2 NRC Docket No. 50-391

Subject:

WATTS BAR NUCLEAR PLANT (WBN) UNIT 2 - INSTRUMENTATION AND CONTROLS STAFF INFORMATION REQUESTS

Reference:

1. Licensee Open Items to be Resolved for SER Approval List The purpose of this letter is to provide TVA's responses to NRC's information requests on the "Licensee Open Items to be Resolved for SER Approval List." Enclosure 1 to this letter provides TVA's responses to the information requested by NRC. contains the supporting documents for TVA's responses to NRC's requests/questions provided in Enclosure 1. Enclosure 3 provides the new regulatory commitment contained in this letter.

Attachments 1 and 4 contain information proprietary to Westinghouse Electric Corporation (WEC). TVA requests that the WEC proprietary information be withheld from public disclosure in accordance with 10 CFR § 2.390. Attachments 2 and 5 contain the corresponding non-proprietary versions of the documents. Attachments 3 and 6 contain the corresponding affidavits for withholding proprietary information from public disclosure.

U.S. Nuclear Regulatory Commission Page 2 March 16, 2010 I declare under penalty of perjury that the foregoing is true and correct. Executed on the 16th day of March, 2011.

If you have any questions, please contact William Crouch at (423) 365-2004.

Sincerely, David Stinson Watts Bar Unit 2 Vice President

Enclosures:

1. Responses to Licensee Open Items To Be Resolved For SER Approval

2.

List of Attachments

3. New Regulatory Commitment cc (Enclosures):

U. S. Nuclear Regulatory Commission Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257 NRC Resident Inspector Unit 2 Watts Bar Nuclear Plant 1260 Nuclear Plant Road Spring City, Tennessee 37381

Enclosure I TVA Letter Dated March 16, 2011 Responses to Licensee Open Items to be Resolved for SER Approval For some NRC RAI requests, this letter provides TVA's initial response. For the other NRC RAI requests in this letter, a response has been provided in previous TVA letters to the NRC and the NRC has subsequently requested additional information. For these requests, the initial TVA response is not repeated below. The additional NRC information requests are identified in this letter as "Follow-up NRC Requests." TVA responses to these items are identified as "TVA Response to Follow-up NRC Request."

The following acronyms/abbreviations are used in this letter:

FAT Factory Acceptance Test FSAR Final Safety Analysis Report IV&V Independent Verification and Validation LTR Licensing Technical Report MTTR Mean Time To Repair NRC Nuclear Regulatory Commission PAMS Post Accident Monitoring System TVA Tennessee Valley Authority WBN2 Watts Bar Nuclear Unit 2 IEEE Institute of Electrical and Electronics Engineers Inc.

1.

NRC Request (Item Number 074)

By letter dated March 12, 2010 TVA stated that the target submittal date for the Post FAT IV&V Phase Summary Report was November 30, 2010.

TVA Response to NRC Request: contains WNA-VR-00283-WBT-P, "IV&V Summary Report for the Post Accident Monitoring System," Revision 4, dated March 2011 (proprietary). Attachment 2 contains WNA-VR-00283-WBT-NP, "IV&V Summary Report for the Post Accident Monitoring System," Revision 4, dated March 2011 (non-proprietary). Attachment 3 contains CWA-1 1-3121, Application for Withholding Proprietary Information from Public Disclosure, WNA-VR-00283-WBT-P, Revision 4 "Nuclear Automation IV&V Summary Report for the Post Accident Monitoring System" (Proprietary)," dated March 3, 2011.

2.

NRC Request (Item Number 212)

By letter dated June 18, 2010 (ML101940236) TVA stated (Enclosure 1, Attachment 3, Item No. 3) that the PAMS system design specification and software requirements specification contain information to address the "Design Report on Computer Integrity, Test and Calibration..." The staff has reviewed these documents, and it is not clear how this is the case.

(1) Please describe how the information provided demonstrates compliance with IEEE 603-1991 Clauses 5.5, 5.7, 5.10, & 6.5.

(2) Please describe how the information provided demonstrates conformance with IEEE 7-4.3.2-2003 Clauses 5.5 & 57.

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Enclosure I TVA Letter Dated March 16, 2011 Responses to Licensee Open Items to be Resolved for SER Approval NRC Follow up Request:

(a) IEEE 603 Clause 5.5 basically states that conditions identified in IEEE 603 Clauses 4.7 & 4.8 must be addressed in the design. Energy supply conditions have not been identified, or explicitly addressed.

(b) WNA-AR-00189-WBT Rev. 0 Table 5-2 shows a MTTR of 7.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. It is not clear how this satisfies the contractual item No. 179.

TVA Response to Follow-up NRC Request:

(a) Energy Supply conditions are specified in WNA-DS-01617-WBT-P, System Requirements Specification Rev. 4, Requirement 4.1-1 which requires 120Vac +/-10%

and 60+/-3Hz. Power to the Common Q PAMS is provided from the 120Vac vital power system. Per WBN Unit 2 FSAR section 8.3.1.1 the vital 120 volt ac system specifications are 120Vac +/-2% and 60+/-0.5Hz. Based on this, the power provided meets the system requirements.

Electromagnetic compatibility, seismic and environmental qualification of the equipment to meet the design basis requirements is documented in EQ-QR-68-WBT-P, Revision 0 "Qualification Summary Report for Post-Accident Monitoring System (PAMS)" (Proprietary) (Attachment 4). Attachment 5 contains EQ-QR-68-WBT-NP, Revision 0 "Qualification Summary Report for Post-Accident Monitoring System (PAMS)" (non-proprietary). Attachment 6 contains CWA-1 1-3118, Application for Withholding Proprietary Information from Public Disclosure, EQ-QR-68-WBT-P, Revision 0 "Qualification Summary Report for Post-Accident Monitoring System (PAMS)," (Proprietary), dated February 28, 2011.

(b) The Contract Compliance Matrix Item 179 in Revision 3 of the Licensing Technical Report will be revised to show this item as a deviation and to reflect TVA's acceptance of the 7.2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> MTTR value. WNA-LI-00058-WBT-P, "Post-Accident Monitoring System (PAMS) Licensing Technical Report," Revision 3, (proprietary) dated March 2011, will be submitted no later than March 29, 2011.

2 TVA Letter Dated March 16, 2011 Responses to Licensee Open Items to be Resolved for SER Approval List of Attachments

1.

Westinghouse Electric Company WNA-VR-00283-WBT-P, Revision 4 "Nuclear Automation IV & V Summary Report for the Post Accident Monitoring System" (Proprietary), dated March 2011

2.

Westinghouse Electric Company WNA-VR-00283-WBT-NP, Revision 4 "Nuclear Automation IV&V Summary Report for the Post Accident Monitoring System," dated March 2011 (non-proprietary)

3.

Westinghouse Electric Company CWA-1 1-3121, Application for Withholding Proprietary Information from Public Disclosure, WNA-VR-00283-WBT-P, Revision 4 "Nuclear Automation IV&V Summary Report for the Post Accident Monitoring System" (Proprietary)," dated March 3, 2011

4.

Westinghouse Electric Company EQ-QR-68-WBT-P, Revision 0 "Qualification Summary Report for Post-Accident Monitoring System (PAMS)" (Proprietary), dated February 2011

5.

Westinghouse Electric Company EQ-QR-68-WBT-NP, Revision 0 "Qualification Summary Report for Post-Accident Monitoring System (PAMS)" (non-proprietary), dated February 2011

6.

Westinghouse Electric Company CWA-1 1-3118, Application for Withholding Proprietary Information from Public Disclosure, EQ-QR-68-WBT-P, Revision 0 "Qualification Summary Report for Post-Accident Monitoring System (PAMS)," (Proprietary), dated February 28, 2011 1

TVA Letter Dated March 16, 2011 Responses to Licensee Open Items to be Resolved for SER Approval New Regulatory Commitment WNA-LI-00058-WBT-P, "Post-Accident Monitoring System (PAMS) Licensing Technical Report,"

Revision 3, (proprietary) dated March 2011, will be submitted no later than March 29, 2011.

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