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| number = ML15030A460
| number = ML15030A460
| issue date = 02/09/2015
| issue date = 02/09/2015
| title = Catawba Nuclear Station, Units 1 and 2, Request for Additional Information Regarding License Amendment Request to Support a Measurement Uncertainty Recapture Power Uprate (TAC Nos. MF4526 and MF4527)
| title = Request for Additional Information Regarding License Amendment Request to Support a Measurement Uncertainty Recapture Power Uprate
| author name = Miller G E
| author name = Miller G
| author affiliation = NRC/NRR/DORL/LPLII-1
| author affiliation = NRC/NRR/DORL/LPLII-1
| addressee name = Henderson K
| addressee name = Henderson K
Line 9: Line 9:
| docket = 05000413, 05000414
| docket = 05000413, 05000414
| license number = NPF-035, NPF-052
| license number = NPF-035, NPF-052
| contact person = Miller G E
| contact person = Miller G
| case reference number = TAC MF4526, TAC MF4527
| case reference number = TAC MF4526, TAC MF4527
| document type = Letter, Request for Additional Information (RAI)
| document type = Letter, Request for Additional Information (RAI)
Line 18: Line 18:


=Text=
=Text=
{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. Kelvin Henderson Site Vice President Catawba Nuclear Station Duke Energy Carolinas, LLC 4800 Concord Road York, NC 297 45 February 9, 2015
{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 February 9, 2015 Mr. Kelvin Henderson Site Vice President Catawba Nuclear Station Duke Energy Carolinas, LLC 4800 Concord Road York, NC 297 45


==SUBJECT:==
==SUBJECT:==
CA:VAWBA NUCLEAR STATION, UNITS 1 AND 2: REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO SUPPORT A MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE FOR CATAWBA, UNIT 1 (TAC NOS. MF4526 AND MF4527)  
CA:VAWBA NUCLEAR STATION, UNITS 1 AND 2: REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO SUPPORT A MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE FOR CATAWBA, UNIT 1 (TAC NOS. MF4526 AND MF4527)


==Dear Mr. Henderson,==
==Dear Mr. Henderson,==
By letter dated Jurie 23, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 14176A109), Duke Energy Carolinas, LLC (Duke) submitted a license amendment request to increase the Catawba, Unit 1, authorized core power level from 3,411 megawatts thermal (MWt) .to 3,469 MWt, an increase of approximately  
 
: 1. 7 percent rated thermal power. The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the licensee's submittal and determined that additional information is needed in order to complete the NRC staff's review. Enclosure 1 describes this request for additional information (RAI). The NRC staff notes that, as identified in SRXR -RAI 8, your original submittal contained neutron fluence values that were calculated using a code not currently approved for Catawba. As discussed in with your staff, the NRC can incorporate the review of a new fluence methqdology into the measurement uncertainty recapture review; however, the NRC staff estimates that this will result in an approximate 8 month delay in the review schedule.
By letter dated Jurie 23, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14176A109), Duke Energy Carolinas, LLC (Duke) submitted a license amendment request to increase the Catawba, Unit 1, authorized core power level from 3,411 megawatts thermal (MWt) .to 3,469 MWt, an increase of approximately 1. 7 percent rated thermal power.
If you have any questions, please call me at 301-415-2481.
The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the licensee's submittal and determined that additional information is needed in order to complete the NRC staff's review. Enclosure 1 describes this request for additional information (RAI).
Docket Nos. 50:-413 and 50-414  
The NRC staff notes that, as identified in SRXR - RAI 8, your original submittal contained neutron fluence values that were calculated using a code not currently approved for Catawba.
As discussed in with your staff, the NRC can incorporate the review of a new fluence methqdology into the measurement uncertainty recapture review; however, the NRC staff estimates that this will result in an approximate 8 month delay in the review schedule.
 
K. Henderson                                  If you have any questions, please call me at 301-415-2481.
G. Edward Miller, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50:-413 and 50-414


==Enclosure:==
==Enclosure:==
As stated cc w/encl: Distribution via Listserv


As stated cc w/encl: Distribution via Listserv G. Edward Miller, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST TO SUPPORT THE MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE DUKE ENERGY CAROLINAS, LLC CATAWBA NUCLEAR STATION, UNITS 1 AND 2 DOCKET NOS. 50-413 AND 50-414 TAC NOS. MF4328 AND MF4329 By letter dated June 23, 2014, Duke Energy Carolinas, LLC (Duke), the licensee for Catawba Nuclear Station, Units 1 and 2 (Catawba), requested a measurement uncertainty recapture (MUR) power uprate (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 14176 A109). The proposed revision would increase the Catawba, Unit 1, authorized core power level from 3411 megawatts thermal (MWt) to 3469 MWt, an increase of 1. 7 percent rated thermal power. Based on the review of the amendment request, the U.S. Nuclear Regulatory Commission (NRC) staff has determined that additional information is required regarding the MUR power up rate Reactor Systems Branch (SRXB) -RAI 8 The RAPTOR3G code used to calculate fluence for MUR conditions does not appear to be approved by the NRC for use in this scenario.
REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST TO SUPPORT THE MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE DUKE ENERGY CAROLINAS, LLC CATAWBA NUCLEAR STATION, UNITS 1 AND 2 DOCKET NOS. 50-413 AND 50-414 TAC NOS. MF4328 AND MF4329 By letter dated June 23, 2014, Duke Energy Carolinas, LLC (Duke), the licensee for Catawba Nuclear Station, Units 1 and 2 (Catawba), requested a measurement uncertainty recapture (MUR) power uprate (Agencywide Documents Access and Management System (ADAMS)
The NRC staff requests that .the licensee provide justification for the use of RAPTOR3G for fluence calculations for MUR conditions, or provide an alternative fluence calculation using an NRC approved method. SRXB-RAI9 In response to SRXB-RAI 1, Duke indicated that it was Catawba's "intention" to directly trend different measurements of plant power. Please clarify the use of the word intention.
Accession No. ML14176A109). The proposed revision would increase the Catawba, Unit 1, authorized core power level from 3411 megawatts thermal (MWt) to 3469 MWt, an increase of
SRXB-RAI10 Please indicate whether the Leading Edge Flow Meter transducers have been evaluated for environmental qualification with respect to the radiological environment in which they will be used. Enclosure   Steam Generator and Chemical Engineering Branch (ESGB)-RAJ 3 Describe the evaluations performed to assess the potential impact of the power uprate on steam generator (SG) tube vibration response and consequential wear degradation (wear at tube support locations, tube-to-tube wear) and fatigue. This should include a description of the impact of the power uprate on average and peak thermal hydraulic parameters (e.g., gap velocities, dynamic pressures, void fractions, and steam quality) and how these were considered in assessing tube wear and fatigue performance.
: 1. 7 percent rated thermal power.
This should also include a discussion of whether these thermal hydraulic conditions are within the envelope of successful experience at other plants of similar design and size. "Successful experience" in this context refers to avoiding rapidly developing degradation mechanisms that cannot be successfully managed through the SG program.
Based on the review of the amendment request, the U.S. Nuclear Regulatory Commission (NRC) staff has determined that additional information is required regarding the MUR power up rate Reactor Systems Branch (SRXB) - RAI 8 The RAPTOR3G code used to calculate fluence for MUR conditions does not appear to be approved by the NRC for use in this scenario. The NRC staff requests that .the licensee provide justification for the use of RAPTOR3G for fluence calculations for MUR conditions, or provide an alternative fluence calculation using an NRC approved method.
K Henderson If you have any questions, please call me at 301-415-2481.
SRXB-RAI9 In response to SRXB- RAI 1, Duke indicated that it was Catawba's "intention" to directly trend different measurements of plant power. Please clarify the use of the word intention.
Sincerely, /RAJ G. Edward Miller, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos.* 50-413 and 50-414
SRXB- RAI10 Please indicate whether the Leading Edge Flow Meter transducers have been evaluated for environmental qualification with respect to the radiological environment in which they will be used.
Enclosure


==Enclosure:==
Steam Generator and Chemical Engineering Branch (ESGB)- RAJ 3 Describe the evaluations performed to assess the potential impact of the power uprate on steam generator (SG) tube vibration response and consequential wear degradation (wear at tube support locations, tube-to-tube wear) and fatigue. This should include a description of the impact of the power uprate on average and peak thermal hydraulic parameters (e.g., gap velocities, dynamic pressures, void fractions, and steam quality) and how these were considered in assessing tube wear and fatigue performance. This should also include a discussion of whether these thermal hydraulic conditions are within the envelope of successful experience at other plants of similar design and size. "Successful experience" in this context refers to avoiding rapidly developing degradation mechanisms that cannot be successfully managed through the SG program.


As stated cc w/encl: Distribution via Listserv DISTRIBUTION:
ML15030A460                                      *Via E-mail **Via memo OFFICE NRR/LPLI-1 /PM       NRR/LPL2-1/LA   NRR/DSS/SRXB       NRR/DE/ESGB          NRR/LPL2-1 /BC NAME     GEMiller           SFigueroa       CJackson*         GKulesa**            RPascarelli DATE     02/05/15           02/04/15         02/05/15           01/07/14             02/09/15}}
PUBLIC LPL2-1 R/F RidsNrrDorllpl2-1
'Resource RidsNrrLASFigueroa Resource RidsNrrPMCatawba Resource RidsNrrSsSrxb Resource RidsNrrDeEmcb Resource RidsNrrSsScvb Resource RidsNrrDraAfpb Resource ADAMS Accession No. ML 15030A460 OFFICE N RR/LPLI-1  
/PM NRR/LPL2-1/LA NRR/DSS/SRXB NAME GEMiller SFigueroa CJackson*
DATE 02/05/15 02/04/15 02/05/15 OFFICIAL RECORD COPY RidsNrrDeEsgb Resource RidsAcrsAcnw
_MaiiCTR Resource RidsRgn2MaiiCenter Resource ..--' *Via E-mail **Via memo NRR/DE/ESGB NRR/LPL2-1
/BC GKulesa**
RPascarelli 01/07/14 02/09/15}}

Latest revision as of 15:27, 19 March 2020

Request for Additional Information Regarding License Amendment Request to Support a Measurement Uncertainty Recapture Power Uprate
ML15030A460
Person / Time
Site: Catawba  Duke Energy icon.png
Issue date: 02/09/2015
From: Geoffrey Miller
Plant Licensing Branch II
To: Henderson K
Duke Energy Carolinas
Miller G
References
TAC MF4526, TAC MF4527
Download: ML15030A460 (5)
v • d • e


Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 February 9, 2015 Mr. Kelvin Henderson Site Vice President Catawba Nuclear Station Duke Energy Carolinas, LLC 4800 Concord Road York, NC 297 45

SUBJECT:

CA:VAWBA NUCLEAR STATION, UNITS 1 AND 2: REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO SUPPORT A MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE FOR CATAWBA, UNIT 1 (TAC NOS. MF4526 AND MF4527)

Dear Mr. Henderson,

By letter dated Jurie 23, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14176A109), Duke Energy Carolinas, LLC (Duke) submitted a license amendment request to increase the Catawba, Unit 1, authorized core power level from 3,411 megawatts thermal (MWt) .to 3,469 MWt, an increase of approximately 1. 7 percent rated thermal power.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the licensee's submittal and determined that additional information is needed in order to complete the NRC staff's review. Enclosure 1 describes this request for additional information (RAI).

The NRC staff notes that, as identified in SRXR - RAI 8, your original submittal contained neutron fluence values that were calculated using a code not currently approved for Catawba.

As discussed in with your staff, the NRC can incorporate the review of a new fluence methqdology into the measurement uncertainty recapture review; however, the NRC staff estimates that this will result in an approximate 8 month delay in the review schedule.

K. Henderson If you have any questions, please call me at 301-415-2481.

G. Edward Miller, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50:-413 and 50-414

Enclosure:

As stated cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST TO SUPPORT THE MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE DUKE ENERGY CAROLINAS, LLC CATAWBA NUCLEAR STATION, UNITS 1 AND 2 DOCKET NOS. 50-413 AND 50-414 TAC NOS. MF4328 AND MF4329 By letter dated June 23, 2014, Duke Energy Carolinas, LLC (Duke), the licensee for Catawba Nuclear Station, Units 1 and 2 (Catawba), requested a measurement uncertainty recapture (MUR) power uprate (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML14176A109). The proposed revision would increase the Catawba, Unit 1, authorized core power level from 3411 megawatts thermal (MWt) to 3469 MWt, an increase of

1. 7 percent rated thermal power.

Based on the review of the amendment request, the U.S. Nuclear Regulatory Commission (NRC) staff has determined that additional information is required regarding the MUR power up rate Reactor Systems Branch (SRXB) - RAI 8 The RAPTOR3G code used to calculate fluence for MUR conditions does not appear to be approved by the NRC for use in this scenario. The NRC staff requests that .the licensee provide justification for the use of RAPTOR3G for fluence calculations for MUR conditions, or provide an alternative fluence calculation using an NRC approved method.

SRXB-RAI9 In response to SRXB- RAI 1, Duke indicated that it was Catawba's "intention" to directly trend different measurements of plant power. Please clarify the use of the word intention.

SRXB- RAI10 Please indicate whether the Leading Edge Flow Meter transducers have been evaluated for environmental qualification with respect to the radiological environment in which they will be used.

Enclosure

Steam Generator and Chemical Engineering Branch (ESGB)- RAJ 3 Describe the evaluations performed to assess the potential impact of the power uprate on steam generator (SG) tube vibration response and consequential wear degradation (wear at tube support locations, tube-to-tube wear) and fatigue. This should include a description of the impact of the power uprate on average and peak thermal hydraulic parameters (e.g., gap velocities, dynamic pressures, void fractions, and steam quality) and how these were considered in assessing tube wear and fatigue performance. This should also include a discussion of whether these thermal hydraulic conditions are within the envelope of successful experience at other plants of similar design and size. "Successful experience" in this context refers to avoiding rapidly developing degradation mechanisms that cannot be successfully managed through the SG program.

ML15030A460 *Via E-mail **Via memo OFFICE NRR/LPLI-1 /PM NRR/LPL2-1/LA NRR/DSS/SRXB NRR/DE/ESGB NRR/LPL2-1 /BC NAME GEMiller SFigueroa CJackson* GKulesa** RPascarelli DATE 02/05/15 02/04/15 02/05/15 01/07/14 02/09/15

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