ML11199A215
| ML11199A215 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 07/14/2011 |
| From: | Stinson D Tennessee Valley Authority |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML11199A215 (4) | |
Text
Tennessee Valley Authority, Post Office Box 2000, Spring City, Tennessee 37381-2000 July 14, 2011 10 CFR 50.68(b)(6)
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 - Final Safety Analysis Report (FSAR) - Response to Request for Additional Information (RAI)
Regarding Compliance with 10 CFR 50.68(b)(6)
Reference:
TVA letter to NRC dated February 25, 2011, "Watts Bar Nuclear Plant (WBN) Unit 2 - Final Safety Analysis Report (FSAR) - Response to Chapters 11 and 12 Request for Additional Information" This letter provides a response to a verbal request to provide additional information that establishes that WBN Unit 2 is in compliance with 10 CFR 50.68(b)(6). The reference provided TVA's position on compliance with the stated regulation. The referenced letter did not completely address the need for information on conformance with 10 CFR 50.68(b)(6). provides the requested information. A new commitment is provided in.
I declare under penalty of perjury that the foregoing is true and correct. Executed on the 14 th day of July, 2011.
Respectfully, David Stinson Watts Bar Unit 2 Vice President ik4L
U.S. Nuclear Regulatory Commission Page 2 July 14, 2011
Enclosures:
- 1.
WBN Unit 2 Response to RAI Regarding Compliance with 10 CFR 50.68(b)(6)
- 2.
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 WBN UNIT 2 RESPONSE TO RAI REGARDING COMPLIANCE WITH 10 CFR 50.68(b)(6)
NRC Question TVA's response to NRC Question 27 provided in reference 1 did not provide an adequate basis to establish conformance with 10 CFR 50.68(b)(6) related to adequate radiation monitors to detect excessive radiation and initiate appropriate safety actions. Additional information is required for the NRC staff to conclude that WBN Unit 2 conforms to 10 CFR 50.58(b) (6).
TVA Response WBN conforms fully with the criteria of 10 CFR 50.68(b)(6). There are five radiation monitors located on elevation 757 of the Auxiliary Building in the vicinity of the new fuel vault and the spent fuel pool. Two of the monitors, 1-RE-90-1 and 2-RE-90-1, are area monitors that alert personnel in the vicinity of the fuel storage areas of excessive radiation for personnel protection and to initiate safety actions. These monitors also alarm in the main control room to alert the operators to initiate appropriate safety actions. There are two additional area radiation monitors, 0-RE-90-102 and 0-RE-90-103, that are located at the spent fuel pool to provide a more rapid response to a fuel handling accident, the presence of excessive radiation, or the presence of a fuel bundle with inadequate water shielding. These monitors alarm in the main control room and also isolate the normal Auxiliary Building ventilation system to reduce the release of radioactivity offsite. These monitors will also isolate the containment ventilation system if the containment or annulus is open to the Auxiliary Building during refueling operations. The fifth radiation monitor in the spent and new fuel area is a particulate air monitor.
This monitor alarms locally for protection of personnel in the vicinity of the monitor and also serves to alert the plant staff of an excessive radiation condition that requires action.
This information will be incorporated in FSAR Section 4.3.2.7, "Criticality of Fuel Assemblies," in a future FSAR amendment.
ENCLOSURE 2 REGULATORY COMMITMENT Revise FSAR Section 4.3.2.7, "Criticality of Fuel Assemblies," to incorporate the information provided in Enclosure 1 in a future FSAR amendment.