ML11224A031

OL - TVA Letter to NRC_07-14-11_FSAR Rai_Nrc RAI 50.68b

ML11224A031
Person / Time
Site:	Watts Bar
Issue date:	07/14/2011
From:	- No Known Affiliation
To:	Division of Operating Reactor Licensing
References
Download: ML11224A031 (7)

Text

WBN2Public Resource From: Boyd, Desiree L [dlboyd@tva.gov]

Sent: Thursday, July 14, 2011 10:08 AM To: Epperson, Dan; Poole, Justin; Raghavan, Rags; Milano, Patrick; Campbell, Stephen Cc: Crouch, William D; Hamill, Carol L; Boyd, Desiree L

Subject:

TVA letter to NRC_07-14-11_FSAR RAI_NRC RAI 50.68b Attachments: 07-14-11_FSAR RAI_NRC RAI 50.68b_Final.pdf Please see attached TVA letter that was sent to the NRC today.

Thank You,

~*~*~*~*~*~*~*~*~*~*~*~

Désireé L. Boyd WBN 2 Licensing Support Sun Technical Services dlboyd@tva.gov 423-365-8764 1

Hearing Identifier: Watts_Bar_2_Operating_LA_Public Email Number: 456 Mail Envelope Properties (7AB41F650F76BD44B5BCAB7C0CCABFAF20D4AFAC)

Subject:

TVA letter to NRC_07-14-11_FSAR RAI_NRC RAI 50.68b Sent Date: 7/14/2011 10:07:42 AM Received Date: 7/14/2011 10:09:50 AM From: Boyd, Desiree L Created By: dlboyd@tva.gov Recipients:

"Crouch, William D" <wdcrouch@tva.gov>

Tracking Status: None "Hamill, Carol L" <clhamill@tva.gov>

Tracking Status: None "Boyd, Desiree L" <dlboyd@tva.gov>

Tracking Status: None "Epperson, Dan" <Dan.Epperson@nrc.gov>

Tracking Status: None "Poole, Justin" <Justin.Poole@nrc.gov>

Tracking Status: None "Raghavan, Rags" <Rags.Raghavan@nrc.gov>

Tracking Status: None "Milano, Patrick" <Patrick.Milano@nrc.gov>

Tracking Status: None "Campbell, Stephen" <Stephen.Campbell@nrc.gov>

Tracking Status: None Post Office: TVANUCXVS2.main.tva.gov Files Size Date & Time MESSAGE 302 7/14/2011 10:09:50 AM 07-14-11_FSAR RAI_NRC RAI 50.68b_Final.pdf 284291 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

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

U.S. Nuclear Regulatory Commission Page 3 July 14, 2011 bcc (Enclosures):

Stephen Campbell U.S. Nuclear Regulatory Commission MS 08H4A One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738 Charles Casto, Deputy Regional Administrator for Construction U. S. Nuclear Regulatory Commission Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257

ENCLOSURE 1 WBN UNIT 2 RESPONSE TO RAI REGARDING COMPLIANCE WITH 10 CFR 50.68(b)(6)

NRC Question TVAs 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.