Letter Sequence Request |
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TAC:ME2731, Clarify Application of Setpoint Methodology for LSSS Functions (Withdrawn, Closed) |
Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, ... further results|Request]]
- Acceptance...
- Supplement, Supplement, Supplement
Results
Other: CNL-14-077, Responses to Degraded Voltage Issue Requests for Additional Information, ML101050203, ML102240630, ML102290358, ML102290360, ML102290361, ML102290362, ML102290363, ML102290364, ML102290365, ML102290366, ML102290367, ML102290368, ML102290383, ML102290384, ML102290385, ML102290386, ML102290387, ML102290388, ML102290389, ML102290390, ML102290391, ML102290392, ML102290403, ML102290404, ML102290405, ML102290406, ML102290407, ML102290408, ML102290409, ML102290410, ML102290411, ML102290414, ML102290439, ML102290440, ML102290441, ML102290442, ML102290443, ML102290444, ML102290445, ML102290446, ML102290447, ML102290448, ML102290458, ML102290459, ML102290460, ML102290461, ML102290462, ML102290463, ML102290464... further results
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MONTHYEARML0933702752009-11-24024 November 2009
Final Safety Analysis Report, Amendment 95, Cover Letter
Project stage: Request
ML12192A3682009-12-0909 December 2009
Tennessee Department of Health Public Health Assessment 2009
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ML1001916862010-01-11011 January 2010
Final Safety Analysis Report, Amendment 97, Section 8 - Electric Power Through 8E-12
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ML1001914212010-01-11011 January 2010
Final Safety Analysis Report, Amendment 97
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ML1002204742010-02-0505 February 2010
IP 37002, Construction Refurbishment Process - Watts Bar Unit 2
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ML1005500072010-03-11011 March 2010
Request for Additional Information Related to Licensees Final Safety Analysis Report Amendment 95 Related to Section 4.2.2, Reactor Vessel Internal Components
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OL - List of Documents for Docketing Referenced on Page 5 of the Site Audit Trip Report
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ML1010502032010-04-0808 April 2010
Additional Information Regarding Final Safety Analysis Report, Chapter 7, Instrumentation and Controls Review - Requested Common Q Proprietary Documents
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ML1010405732010-04-0909 April 2010
Response to NRC Request for Additional Information Regarding Licensees Final Safety Analysis Report (FSAR) Amendment Related to Section 4.2.2, Reactor Vessel Internal Components
Project stage: Response to RAI
ML1011701022010-04-27027 April 2010
Notice of Meeting with Tennessee Valley Authority to Discuss Watts Bar Nuclear Plant, Unit 2, Final Safety Analysis Report Submittals
Project stage: Request
ML1011303512010-05-0505 May 2010
Request for Withholding Information from Public Disclosure (Tac No. ME2731)
Project stage: Withholding Request Acceptance
ML1016102902010-05-27027 May 2010
Transmittal of Amendment 99 to Final Safety Analysis Report (FSAR)
Project stage: Request
ML1016203602010-06-17017 June 2010
Notice of Forthcoming Meeting with Tennessee Valley Authority (TVA) to Discuss the Complete Status of TVA Hydrology Issues Including the Flooding Effects on the TVA Operating Nuclear Plants
Project stage: Request
ML1014500842010-06-23023 June 2010
Request for Additional Information Regarding Licensees Final Safety Analysis Report Amendment Related to Reactor Systems, Nuclear Performance and Code Review, Ansd Plant Systems
Project stage: RAI
ML1015402502010-06-24024 June 2010
Request for Additional Information Regarding Licensees Final Safety Analysis Report Amendment Related to Nuclear Performance and Code Review, Plant Systems, and Testing (Tac Nos. ME2731 and ME3091)
Project stage: RAI
ML1017903992010-06-28028 June 2010
Request for Additional Information (RAI) Regarding Licensees Final Safety Analysis Report Amendment Related to Section 4.2.2, Reactor Vessel Internal Components
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ML1016200062010-06-29029 June 2010
Request for Additional Information Regarding Licensees Final Safety Analysis Report Amendment Related to Nuclear Performance and Code Review (Tac No. ME2731)
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ML1015304742010-07-0202 July 2010
Request for Additional Information Regarding Licensees Final Safety Analysis Report Amendment Related to Mechanical and Civil Engineering Systems
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ML1016000262010-07-0808 July 2010
Request for Additional Information Regarding Licensees Final Safety Analysis Report, Amendment Related to Quality and Vendor Branch Review
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ML1015303542010-07-12012 July 2010
Request for Additional Information Regarding Licensees Final Safety Analysis Report Amendment Related to Electrical Engineering Systems
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ML1018001562010-07-15015 July 2010
Request for Additional Information Regarding Licensees Final Safety Analysis Report Amendment Related to Chapter 8, Electric Power
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ML1020202812010-07-30030 July 2010
Request for Additional Information Regarding Licensees Final Safety Analysis Report Amendment Related to Chapter 3.11
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Final Safety Analysis Report Figure 9.2-9 (Dwg No. 1-47W611-67-5, R10)
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Final Safety Analysis Report Figure 9.2-3 (Dwg No. 1-47W845-3, R23)
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2010-05-05
[Table View] |
Text
Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000 September 1, 2010 u.S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Stop: OWFN P1-35 Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Unit 2 NRC Docket No. 50-391 10 CFR 50.4(b)(6) 10 CFR 50.34(b) 10 CFR 2.390(d)(1)
Subject:
Watts Bar Nuclear Plant, Unit 2
- Request for Additional Information (RAI)
Regarding Final Safety Analysis Report Amendment Related Section 3.11 (lAC No. ME2731)
Reference:
1.
Letter from NRC to TVA, 'Watts Bar Nuclear Plant, Unit 2 - Request for Additional Information Regarding Final Safety Analysis Report Amendment Related Section 3.11 (TAC No. ME2731)," dated July 30,2010
[ML102020281]
By letters dated November 24,2009; December 14, 2009; January 11, 2010; May 7,2010; and May 27,2010; the Tennessee Valley Authority submitted FSA~ Amendments 95,96,97,98, and 99, respectively. This letter responds to RAI3.11-2 from Reference 1. provides the responses to the RAI.
There are no new regulatory commitments contained in this letter. If you have any questions, please contact Bill Crouch at (423) 365-2004.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 1§! day of September, 2010.
Sincerely, tani nit 2 Vice President
U.S. Nuclear Regulatory Commission Page 2 September 1, 2010
Enclosure:
- 1.
Response to RAI 3.11-2 cc (Enclosure):
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 1 Response to RAI 3.11-2 Tennessee Valley Authority - Watts Bar Nuclear Plant - Unit 2, Docket No. 50-391 E1-1 3.11-2 Confirm that equipment being replaced or refurbished will be qualified as Category 1 as required by 10 CFR 50.49.
Response
Replaced equipment is being procured qualified to the NUREG-0588, Category 1 requirements.
A small population of components is being refurbished as follows:
- a. All 6.9 kV motors will be refurbished, but only one will be rewound.
Refurbishment that will be performed is considered routine maintenance that does not impact qualification of the motors. The extent of refurbishment undertaken includes the Environmental Qualification (EQ) maintenance requirements as specified in the Qualification Maintenance Data Sheet (QMDS) contained in the applicable Environmental Qualification Data Package (EQDPs).
The refurbishment documentation--materials, process, and the work completion certification, is reviewed against the original qualification report of the motors; and the qualification of the refurbished motors is documented in the applicable EQDP. These Westinghouse motors were originally procured for Watts Bar Unit 1 and Unit 2, and they are qualified to NUREG-0588, Category II (IEEE Standard 323-1971).
Only one containment spray pump motor will be rewound; materials for this motor will be those qualified in the EPRI motor rewind test program, which meets the NUREG-0588, Category I criteria. The qualification will be documented in a new EQDP.
- b. Electrical Penetration Assemblies (EPA):
These EPAs are qualified to NUREG-0588, Category I. The Watts Bar Units 1 and 2 EPAs are of the identical design made by Conax Nuclear which were procured and installed around the same time period.
Unit 2 is refurbishing the EPAs by replacing the missing and the damaged feedthrough modules with new ones of identical design and type and adding some new feedthrough modules qualified to NUREG-0588, Category I.
- c. Terminal Blocks The field walkdown has noted that the terminal blocks installed in the EQ application for Unit 2 are the GE make CR151B, which are qualified to NUREG-0588, Category I. Design modifications have been issued to inspect and replace the EQ terminal blocks that are found damaged or degraded with equivalent CR151B blocks.
ENCLOSURE 1 Response to RAI 3.11-2 Tennessee Valley Authority - Watts Bar Nuclear Plant - Unit 2, Docket No. 50-391 E1-2
- d. Main Steam Isolation Valves (MSIV)
The original Unit 2 MSIVs are qualified to NUREG-0588, Category II. The MSIVs are being refurbished by replacing the missing subcomponents, including the solenoid valves, terminal blocks and manufacturing wiring with the components of the same make, model and type as supplied on the original Purchase Order. With the exception of the solenoid valves, the subcomponents will be qualified to NUREG-0588, Category I requirements. The solenoid valves cannot be upgraded because these equivalent subcomponents are not available qualified to NUREG-0588, Category I requirements.
- e. Cables purchased on Contract 81K5-830078 TVA purchased identical cables under Rockbestos contracts 80K7-826542 and 81K5-830078. The cable purchased under contract 80K7-826542 was purchased and installed prior to the February 22, 1983, cutoff date stipulated in Regulatory Guide 1.89, Revision 1 for Category II qualification and therefore meets the full Regulatory Guide 1.89 and NUREG-0588 requirements for Category II qualification. Verification of the purchasing and installation documentation for cables purchased under Rockbestos contract 81K5-830078 has determined that the cables were purchased in 1982 but installed in 1985. In accordance with Regulatory Guide 1.89, Revision 1, Environmental Qualification of Certain Electric Equipment Important to Safety for Nuclear Power Plants, paragraph 6, Replacement electric equipment installed subsequent to February 22, 1983, must be qualified in accordance with the provisions of 50.49 unless there are sound reasons to the contrary. The NRC staff considers the following to be sound reasons for the use of replacement equipment previously qualified in accordance with the DOR Guidelines or NUREG-0588 in lieu of upgrading...6.c. Identical equipment to be used as a replacement was on hand as part of the utilities stock prior to February 22, 1983. The cable from contract 81K5-830078 is not replacement equipment (i.e., it is new), and it was on hand prior to February 22, 1983, but was installed after 1983. Since the cable from contract 81K5-830078 is of identical design and the installation of the cable is no different than that supplied on contract 80K7-826542, the cable purchased under contract 81K5-830078 is considered equally qualified and acceptable under the Category II requirements. This is documented in EQ Binder WBNEQ-CABL-036.
