Letter Sequence RAI |
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MONTHYEARML13133A0332013-05-0303 May 2013
License Amendment Request for Changes to Technical Specification 3/4.7.11, Ultimate Heat Sink
Project stage: Request
ML13170A4772013-06-26026 June 2013
Acceptance Review Results Regarding Ultimate Heat Sink License Amendment Request
Project stage: Acceptance Review
ML13198A2712013-06-27027 June 2013
Supplement to License Amendment Request for Changes to Technical Specification 3/4.7.11, Ultimate Heat Sink
Project stage: Supplement
ML13197A4012013-07-18018 July 2013
Request for Additional Information Regarding License Amendment Request to Revise Technical Specification 3/4.7.11 Ultimate Heat Sink
Project stage: RAI
ML13204A0352013-07-19019 July 2013
Response to Request for Additional Information Regarding License Amendment Request for Changes to Technical Specification 4/4.7.11, Ultimate Heat Sink
Project stage: Response to RAI
ML13206A0212013-07-23023 July 2013
New RAI for Millstone 2 Ultimate Heat Sink Amendment
Project stage: RAI
ML13213A0672013-07-26026 July 2013
RAI - Ultimate Heat Sink Amendment
Project stage: RAI
ML13213A0242013-07-30030 July 2013
Response to Request for Additional Information Regarding License Amendment Request for Changes to Technical Specification 3/4.7.11, Ultimate Heat Sink
Project stage: Response to RAI
ML13192A2402013-07-30030 July 2013
Acceptance Review Results Regarding Ultimate Heat Sink License Amendment Requests
Project stage: Acceptance Review
ML13219A1092013-08-0101 August 2013
Response to Request for Additional Information Regarding License Amendment Request for Changes to Technical Specification 3/4.7.11, Ultimate Heat Sink
Project stage: Response to RAI
ML13247A7512013-09-0404 September 2013
Ultimate Heat Sink - NRC RAI (September 4, 2013)
Project stage: RAI
ML13281A8092013-10-0202 October 2013
Response to Request for Additional Information Regarding License Amendment Request for Changes to Technical Specification 3/4.7.11, Ultimate Heat Sink
Project stage: Response to RAI
ML14037A4082014-04-18018 April 2014
Issuance of Amendment Revise Technical Specification 3/4.7.11 Ultimate Heat Sink
Project stage: Approval
ML16015A1652014-04-18018 April 2014
Official Exhibit - NRC-043-00-BD01 - Letter from James Kim, Project Manager, NRC, to David A. Heacock, President and Chief Nuclear Officer, Dominion Nuclear, Millstone Power Station, Unit No. 2 - Issuance of Amendment Revise Technical . .
Project stage: Approval
ML15314A5762014-04-18018 April 2014
NRC-043 - Letter from James Kim, Project Manager, N.R.C., to David A. Heacock, President and Chief Nuclear Officer, Dominion Nuclear, Millstone Power Station, Unit No. 2 - Issuance of Amendment Revise Technical Specification 3/4.7.11 ...
Project stage: Approval
2013-07-19
[Table View] |
Text
From:
Kim, James Sent:
Tuesday, July 23, 2013 8:36 AM To:
William D Bartron (william.d.bartron@dom.com)
Cc:
Thomas G Cleary (thomas.g.cleary@dom.com); Mohamed A Elmaghrabi (mohamed.a.elmaghrabi@dom.com)
Subject:
FW: NEW RAI FOR MILLSTONE 2
- Bill, The NRC tech staff wants to get a response ASAP to a new RAI generated in response to MPS2 response letter dated July 19, 2013.
The RAI is shown below.
- Thanks, Jim Kim EMERGENCY DIESEL GENERATOR RAI
=
Background===
The licensee has provided a response to RAI-3 of NRC letter dated July 18, 2013 in a letter dated July 19, 2013. RAI 3 was submitted regarding design operational limits of the emergency diesel generators (EDG).
Issues A) Each EDG is cooled by 3 heat exchangers in series on the Service Water (SW) side.
The licensee has stated that the first cooler in series, i.e. the intercooler (X-83A or B) for each EDG, is the controlling component, meaning that if the cooling requirements of the intercooler is met than the cooling requirements other heat exchangers, i.e. the lube oil cooler and the jacket water cooler, are met.
B) The vendor data sheet for the intercooler specifies greater heat exchange requirements and SW flow requirements than what the licensee has stated in their response to RAI-3.
For an EDG load of 2750 KW and seawater (SW) temperature of 75°F the differences are stated in the table below:
Vendor Data Sheet RAI 3 Response Intercooler heat load at 2750KW 2,769,000 BTU/HR 2,067,000 BTU/HR Seawater flow rate 700 GPM 507 GPM Request
- 1) Please explain fully in detail and prove the statement that the intercooler (X-83A or B) for each EDG is the controlling component, meaning that if the cooling requirements of the intercooler is met than the cooling requirements other heat exchangers, i.e. the lube oil cooler and the jacket water cooler, are met.
- 2) Explain and justify the differences in vendor requirements and the response to RAI 3, as listed in the table above.
