ML11356A226

Request for Additional Information Regarding the Proposed Technical Specification Changes to Allow Use of Shield Building Dome Penetrations During Modes 1 Through 4

ML11356A226
Person / Time
Site:	Sequoyah
Issue date:	12/29/2011
From:	Siva Lingam Plant Licensing Branch II
To:	James Shea Tennessee Valley Authority
Lingam S
References
TAC ME7026
Download: ML11356A226 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 December 29, 2011 Mr. Joseph W. Shea Manager, Corporate Nuclear Licensing Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801

SUBJECT:

SEQUOYAH NUCLEAR PLANT, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING THE PROPOPSED TECHNICAL SPECIFICATION CHANGES TO ALLOW USE OF SHIELD BUILDING DOME PENETRATIONS DURING MODES 1 THROUGH 4 (TAC NO. ME7026)

Dear Mr. Shea:

By letter dated August 31) 2011, and supplemented by letter dated November 28, 2011, you submitted an application for license amendment proposing to temporarily revise the Sequoyah Nuclear Plant (SQN), Unit 2 Technical Specifications. During the SQN, Unit 2 spring 2011 refueling outage (RFO), two penetrations through the shield building (SB) dome were created.

To maintain SB integrity, these penetrations were closed with a steel hatch assembly prior to entering Mode 4 at the end of the spring 2011 RFO. The proposed change will allow opening of one of the penetration hatches in the SB dome for up to 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> per day, 6 days per calendar week while in Modes 1 through 4 during SQN, Unit 2, Cycle 18 (U2R18) between receipt of Nuclear Regulatory Commission (NRC) approval for this proposed request, and until entering Mode 5 at the start of the SQN, Unit 2 fall 2012 RFO (U2R 18).

The NRC staff is reviewing the submittal and has determined that additional information is required to complete its evaluation. This request was discussed with Mr. Clyde Mackaman of your staff on December 22,2011, and it was agreed that a response would be provided within 30 days from the date of this letter.

If you have any questions regarding this matter, I can be reached at 301-415-1564.

Sincerely,

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Siva P. Lingam, Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-328

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

REOUEST FOR ADDITIONAL INFORMATION REGARDING TECHNICAL SPECIFICATION CHANGES TO ALLOW USE OF SHIELD BUILDING DOME PENETRATIONS DURING MODES 1 THROUGH 4 SEOUOYAH NUCLEAR PLANT, UNIT 2 DOCKET NO. 50-328 By letter dated August 31,2011 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML11249A061), and supplemented by letter dated November 28,2011 (ADAMS Accession No. ML11334A054), the Tennessee Valley Authority (the licensee),

submitted a license amendment request (LAR) to revise the Sequoyah Nuclear Plant (SON),

Unit 2, Technical Specifications (TSs) to allow the use of one of the penetration hatches in the shield building dome for up to 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> per day, 6 days per calendar week while in Modes 1 through 4 during SON, Unit 2, Cycle 18 (U2R18) between receipt of Nuclear Regulatory Commission (NRC) approval for this proposed request, and until entering Mode 5 at the start of the SON, Unit 2 fall 2012 refueling outage (U2R18). In order to complete its review of the above documents, the NRC staff needs the following additional information:

1. Define the term, "Dedicated individuals." Will they be assigned unrelated duties? Where will they be stationed?

2. In the LAR it is stated that "Since the individuals are dedicated to this misSion, there is no impact on plant staffing requirements." Please clarify. Is the normal control room staff going to be augmented with additional staff, or will members of the normal control room staff be used as "Dedicated individuals"? The NRC staff's understanding is that the normal plant staff will be augmented; and augmentation is an impact.

3. In the LAR it is stated, "At the open hatch, the individuals, clear material and rigging and close the hatch (33 seconds)." If we assume that the crane is in mid-load (Le., has just touched a load down and is ready to either release the load or retract the load back up through the hatch), will the 33-second duration still be valid?

4. When will training be complete? For example, will training be complete prior to opening a hatch in the manner proposed in this LAR?

5. When will procedure changes be complete? For example, will procedure changes be complete prior to initiation of training?

6. Were there any human factors lessons learned from the Watts Bar Nuclear Plant experience with the proposed configuration in 2005/2006? If yes, describe.

7. Was at least one crew (with the assumed crew augmentation) used in the verification and validation of the proposed manual actions? If not, what plans have been made to Enclosure

-2 assure that a representative sample of personnel are included in verification and validation processes?

8. What communication methods are available to the dedicated individuals to communicate with the control room?

9. Please describe any changes to the simulator that are needed to support the proposed license amendment.

10. Who will monitor the hourly and daily limits associated with the revised TSs? How will they monitor? What kind of documentation will be required?

December 29,2011 Mr. Joseph W. Shea Manager, Corporate Nuclear Licensing Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801

SUBJECT:

SEOUOYAH NUCLEAR PLANT, UNIT 2 - REOUEST FOR ADDITIONAL INFORMATION REGARDING THE PROPOPSED TECHNICAL SPECIFICATION CHANGES TO ALLOW USE OF SHIELD BUILDING DOME PENETRATIONS DURING MODES 1 THROUGH 4 (T AC NO. ME7026)

Dear Mr. Shea:

By letter dated August 31, 2011, and supplemented by letter dated November 28, 2011, you submitted an application for license amendment proposing to temporarily revise the Sequoyah Nuclear Plant (SON), Unit 2 Technical Specifications. During the SON, Unit 2 spring 2011 refueling outage (RFO), two penetrations through the shield building (SB) dome were created.

To maintain SB integrity, these penetrations were closed with a steel hatch assembly prior to entering Mode 4 at the end of the spring 2011 RFO. The proposed change will allow opening of one of the penetration hatches in the SB dome for up to 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> per day, 6 days per calendar week while in Modes 1 through 4 during SON, Unit 2, Cycle 18 (U2R18) between receipt of Nuclear Regulatory Commission (NRC) approval for this proposed request, and until entering Mode 5 at the start of the SON, Unit 2 fall 2012 RFO (U2R18).

The NRC staff is reviewing the submittal and has determined that additional information is required to complete its evaluation. This request was discussed with Mr. Clyde Mackaman of your staff on December 22, 2011, and it was agreed that a response would be provided within 30 days from the date of this letter.

If you have any questions regarding this matter, I can be reached at 301-415-1564.

Sincerely, IRA!

Siva P. Lingam, Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-328

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:

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