ML090770532
| ML090770532 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 03/24/2009 |
| From: | Pickett D Plant Licensing Branch 1 |
| To: | Spina J Calvert Cliffs |
| Pickett D | |
| References | |
| TAC MD9554, TAC MD9555 | |
| Download: ML090770532 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 H:rrch 24, XIP Mr. James A. Spina, Vice President Calvert Cliffs Nuclear Power Plant, Inc.
Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702 SUB..IECT:
REQUEST FOR ADDITIONAL INFORMATION RE: LICENSE AMENDMENT FOR MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 (TAC NOS. MD9554 AND MD9555)
Dear Mr. Spina:
By letter dated August 29,2008, Calvert Cliffs Nuclear Power Plant, Inc., the licensee, proposed to increase the authorized core power level of its Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2, from 2700 megawatts thermal (MWt) to 2737 MWt.
By letter dated February 18, 2009, the licensee responded to the Nuclear Regulatory Commission (NRC) staff's request for additional information dated November 17, 2008. The staff has reviewed this latest submittal and concludes that additional clarification is needed for your response to the NRC's Reactor Systems Branch question number 4. The staff has prepared the enclosed request for additional information.
Based upon discussions with your staff, we understand that you plan to respond to the enclosure within 60 days from the date of this letter. Please contact me at 301-415-1364 if you have any questions.
Sincerely, Douglas V. Pickett, Senior Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-317 and 50-318
Enclosure:
As stated cc w/encl: Distribution via Listserv
REQUEST FOR SUPPLEMENTAL INFORMATION CALVERT CLIFFS NUCLEAR POWER PLANT, INC.
CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 REQUEST FOR MEASUREMENT UNCERTAINTY RECAPTURE UPRATE SUPPLEMENTAL REQUEST NO.3 Based on information obtained in Figures 1 and 2 of Attachment (2) to Response to Request for Additional Information Dated November 17, 2008 - Measurement Uncertainty Recapture Power Uprate - it appears that the downstream pressure transmitters may be in close proximity to either the spool piece or an elbow. Please explain the effects that the spool piece and elbow will have on the pressure indication and what measures will be taken to correct for any effects.
SUPPLEMENTAL REQUEST NO.4 The information provided by the licensee shows inconsistencies between the laboratory calibration setup and the piping run in that there are nearby elbows downstream of the in-situ ultrasonic flow meter installation. The supplement does not appear to discuss or explain these differences between the as-tested and as-installed configuration, as requested by the staff.
This is particularly of concern for the Unit 1,Loop A header, where the spool piece is to be installed 1 foot, 3 inches upstream of a piping elbow. This is narrowly less than a single piping diameter, and far less than the 20 or greater pipe diameters commonly accepted to be the required length to establish fully developed, turbulent flow.
Please explain how the laboratory calibration accounts for the close-by downstream configuration changes that are not discussed in the laboratory testing report.
Enclosure
March 24, 2009 Mr. James A. Spina, Vice President Calvert Cliffs Nuclear Power Plant, Inc.
Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702 SUB..IECT:
REQUEST FOR ADDITIONAL INFORMATION RE: LICENSE AMENDMENT FOR MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2 (TAC NOS. MD9554 AND MD9555)
Dear Mr. Spina:
By letter dated August 29, 2008, Calvert Cliffs l\\Iuclear Power Plant, Inc., the licensee, proposed to increase the authorized core power level of its Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2, from 2700 megawatts thermal (MWt) to 2737 MWt.
By letter dated February 18, 2009, the licensee responded to the Nuclear Regulatory Commission (NRC) staff's request for additional information dated November 17, 2008. The staff has reviewed this latest submittal and concludes that additional clarification is needed for your response to the NRC's Reactor Systems Branch question number 4. The staff has prepared the enclosed request for additional information.
Based upon discussions with your staff, we understand that you plan to respond to the enclosure within 60 days from the date of this letter. Please contact me at 301-415-1364 if you have any questions.
Sincerely, IRA!
Douqlas V. Pickett, Senior Project Manaqer Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-317 and 50-318
Enclosure:
As stated cc w/encl: Distribution via Listserv Distribution:
PUBLIC LPL1-1 r/f RidsOgcRp RidsAcrsAcnwMailCenter RidsNrrDssSrxb RidsNrrDorlLpl1-1 RidsNrrPMDPickett RidsNrrLASLittle DWoodyatt BParks WLyon GDentel, R1 ADAMS Accession No ML090770532 OFFICE PM/LPL1-1 LA:LPL1-1 BC/SRXB BC/LPL1-1 NAME DPickett SUttle GCranston by memo dated MKowal DATE 03/24/09 03/24/09 02/26/09 03/24/09 OFFICIAL RECORD COpy