ML073450684
| ML073450684 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 12/11/2007 |
| From: | Richard Ennis NRC/NRR/ADRO/DORL/LPLI-2 |
| To: | Chernoff H NRC/NRR/ADRO/DORL/LPLI-2 |
| Ennis R, NRR/DORL, 415-1420 | |
| References | |
| TAC MD7027 | |
| Download: ML073450684 (3) | |
Text
December 11, 2007 MEMORANDUM TO: Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: Richard B. Ennis, Senior Project Manager /ra/
Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
SUBJECT:
SALEM NUCLEAR GENERATING STATION, UNIT NO. 2, DRAFT REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MD7027)
The attached draft request for information (RAI) was transmitted on December 11, 2007, to Mr. Jeff Keenan of PSEG Nuclear LLC (the licensee). This information was transmitted to facilitate an upcoming conference call in order to clarify the licensee=s amendment request for Salem Nuclear Generating Station (Salem), Unit No. 2, dated October 17, 2007.
The proposed amendment would allow a one-time revision to the requirements for fuel decay time prior to commencing movement of irradiated fuel in the reactor pressure vessel (RPV).
Currently, Technical Specification (TS) 3/4.9.3, Decay Time requires that: (a) the reactor has been subcritical for at least 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> prior to movement of irradiated fuel in the RPV between October 15th through May 15th; and (b) the reactor has been subcritical for at least 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br /> prior to movement of irradiated fuel in the RPV between May 16th and October 14th. The calendar approach is based on average river water temperature which is cooler in the fall through spring months. The proposed amendment would revise TS 3/4.9.3 to allow fuel movement to commence at 86 hours9.953704e-4 days <br />0.0239 hours <br />1.421958e-4 weeks <br />3.2723e-5 months <br /> after the reactor is subcritical. The proposed change would only be applicable to Salem Unit 2 refueling outage 2R16 which is scheduled to commence on March 4, 2008.
This memorandum and the attachment do not convey or represent an NRC staff position regarding the licensees request.
Docket No. 50-311
Attachment:
Draft RAI
December 11, 2007 MEMORANDUM TO: Harold K. Chernoff, Chief Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: Richard B. Ennis, Senior Project Manager /ra/
Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
SUBJECT:
SALEM NUCLEAR GENERATING STATION, UNIT NO. 2, DRAFT REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MD7027)
The attached draft request for information (RAI) was transmitted on December 11, 2007, to Mr. Jeff Keenan of PSEG Nuclear LLC (the licensee). This information was transmitted to facilitate an upcoming conference call in order to clarify the licensee=s amendment request for Salem Nuclear Generating Station (Salem), Unit No. 2, dated October 17, 2007.
The proposed amendment would allow a one-time revision to the requirements for fuel decay time prior to commencing movement of irradiated fuel in the reactor pressure vessel (RPV).
Currently, Technical Specification (TS) 3/4.9.3, Decay Time requires that: (a) the reactor has been subcritical for at least 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> prior to movement of irradiated fuel in the RPV between October 15th through May 15th; and (b) the reactor has been subcritical for at least 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br /> prior to movement of irradiated fuel in the RPV between May 16th and October 14th. The calendar approach is based on average river water temperature which is cooler in the fall through spring months. The proposed amendment would revise TS 3/4.9.3 to allow fuel movement to commence at 86 hours9.953704e-4 days <br />0.0239 hours <br />1.421958e-4 weeks <br />3.2723e-5 months <br /> after the reactor is subcritical. The proposed change would only be applicable to Salem Unit 2 refueling outage 2R16 which is scheduled to commence on March 4, 2008.
This memorandum and the attachment do not convey or represent an NRC staff position regarding the licensee's request.
Docket No. 50-311
Attachment:
Draft RAI DISTRIBUTION PUBLIC RidsNrrDorlLpl1-2 DHarrison PDI-2 Reading RidsNrrPMREnnis RidsNrrDorlDpr SJones ACCESSION NO.: ML OFFICE PDI-2/PM NAME REnnis DATE 12/11/07 OFFICIAL RECORD COPY
DRAFT REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED LICENSE AMENDMENT REFULEING OPERATIONS - DECAY TIME SALEM NUCLEAR GENERATING STATION, UNIT NO. 2 DOCKET NO. 50-311 By application dated October 17, 2007, PSEG Nuclear LLC (the licensee) submitted an amendment request for Salem Nuclear Generating Station (Salem), Unit No. 2. The proposed amendment would allow a one-time revision to the requirements for fuel decay time prior to commencing movement of irradiated fuel in the reactor pressure vessel (RPV). Currently, Technical Specification (TS) 3/4.9.3, Decay Time requires that: (a) the reactor has been subcritical for at least 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> prior to movement of irradiated fuel in the RPV between October 15th through May 15th; and (b) the reactor has been subcritical for at least 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br /> prior to movement of irradiated fuel in the RPV between May 16th and October 14th. The calendar approach is based on average river water temperature which is cooler in the fall through spring months. The proposed amendment would revise TS 3/4.9.3 to allow fuel movement to commence at 86 hours9.953704e-4 days <br />0.0239 hours <br />1.421958e-4 weeks <br />3.2723e-5 months <br /> after the reactor is subcritical. The proposed change would only be applicable to Salem Unit 2 refueling outage 2R16 which is scheduled to commence on March 4, 2008.
The Nuclear Regulatory Commission staff has reviewed the information the licensee provided that supports the proposed amendment and would like to discuss the following issues to clarify the submittal.
- 1) Section 4.3.d of Attachment 1 to the application dated October 17, 2007, addresses the sensitivity of spent fuel pool temperature to ambient temperature in the fuel building. The comparison of spent fuel pool temperatures at various ambient air temperatures between 105 °F and 120 °F indicate the pool temperature is relatively insensitive to ambient air temperature following a loss of forced cooling. Explain how the Crosstie code models heat loss from the spent fuel pool to the ambient air volume within the building. Also, address why the insensitivity to ambient air temperature is both consistent with the model and a realistic representation of the expected temperature response of the pool to an actual loss of cooling event.
- 2) Assumption 3.3 in Attachment 4 to the application dated October 17, 2007, states that the fuel handling ventilation system must be operating to maintain the ambient air design temperature with the spent fuel pool temperature above 150 °F. Describe the basis for this assumption and the basis to conclude that the ventilation system would remain functional in the ambient air environment at spent fuel pool temperatures up to 180 °F.
Attachment