ML102310526: Difference between revisions
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{{#Wiki_filter:UNITED NUCLEAR REGULATORY WASHINGTON, D.C. 20555*0001 August 27,2010 LICENSEE: | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555*0001 August 27,2010 LICENSEE: Pacific Gas and Electric Company FACILITY: Diablo Canyon Nuclear Power Plant, Units 1 and 2 | ||
Pacific Gas and Electric Company FACILITY: | |||
Diablo Canyon Nuclear Power Plant, Units 1 and 2 | |||
==SUBJECT:== | ==SUBJECT:== | ||
==SUMMARY== | ==SUMMARY== | ||
OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 17, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION | OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 17, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION - METAL FATIGUE The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E) held a telephone conference call on August 17, 2010, to obtain clarification on the staff's draft request for additional information (D-RAI) regarding the Diablo Canyon Nuclear Power Plant license renewal application (LRA). | ||
-METAL FATIGUE The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E) held a telephone conference call on August 17, 2010, to obtain clarification on the staff's draft request for additional information (D-RAI) regarding the Diablo Canyon Nuclear Power Plant license renewal application (LRA). Bye-mail dated August 4,2010, the staff sent D-RAls to PG&E regarding metal fatigue time limited aging analysis review. PG&E reviewed the information contained therein, and requested a telephone conference call. The telephone conference call was useful in clarifying the intent of the staff's D-RAls. Enclosure 1 provides a listing of the participants. | Bye-mail dated August 4,2010, the staff sent D-RAls to PG&E regarding metal fatigue time limited aging analysis review. PG&E reviewed the information contained therein, and requested a telephone conference call. The telephone conference call was useful in clarifying the intent of the staff's D-RAls. Enclosure 1 provides a listing of the participants. Enclosure 2 provides discussions on D-RAls for which the applicant requested clarification. No changes to other D-RAls were necessary as a result of this telephone conference call. Formal RAls will be issued by a separate letter. | ||
Enclosure 2 provides discussions on D-RAls for which the applicant requested clarification. | The applicant had an opportunity to comment on this summary. | ||
No changes to other D-RAls were necessary as a result of this telephone conference call. Formal RAls will be issued by a separate letter. The applicant had an opportunity to comment on this summary. Nathaniel Ferrer, Safety Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323 | Nathaniel Ferrer, Safety Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323 | ||
==Enclosures:== | ==Enclosures:== | ||
As stated cc w/encls: Distribution via Listserv TELEPHONE CONFERENCE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND | As stated cc w/encls: Distribution via Listserv | ||
Based on discussion with the applicant, the staff determined that the Unit pressurizer heater penetration 60-year projected CUF value was 0.9391, not 2.97, as in LRA Table 4.3-6. The staff will revise the question as follows. The revised question will sent as a formal RAI4.3-8 In the LRA Table 4.3-1, the applicant credits the "Global" monitoring (Le. cycle monitoring) of AMP 83.1 as the 10 CFR 54.21 (c)(1)(iii) aging management basis for dispositioning the CUF analyses for the RPV Core Support Pads, Spray Nozzle, and Pressurizer Heater The LRA Table 4.3-1 or LRA Table 4.3-6 indicated that the RPV Core Support Pressurizer Spray Nozzle, and Pressurizer Heater Penetration in Unit 1 have maximum limiting design basis CUFs of -0.89, -0.95, and -0.94 respectively limiting 60-year projected CUFs of -1.07, -1.14, and Justify your basis for using the "Global" monitoring method of AMP B3.1 to monitor components during the period of extended operation in accordance 10 CFR 54.21 (c)(1)(iii), and why it would not be more appropriate to monitor for components using the CBF monitoring ENCLOSURE 2 | |||
August 27.2010 LICENSEE: | TELEPHONE CONFERENCE CALL DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS AUGUST 17, 2010 PARTICIPANTS AFFILIATIONS Nate Ferrer U.S. Nuclear Regulatory Commission (NRC) | ||
Pacific Gas and Electric Company FACILITY: | James Medoff !\IRC Todd Mintz Center for Nuclear Waste Regulatory Analyses Philippe Soenen Pacific Gas and Electric Company (PG&E) | ||
Diablo Canyon Nuclear Power Plant, Units 1 and 2 SUB..IECT: | Michelle Albright PG&E Kevin Braico PG&E Dave Kunsemiller Strategic Teaming And Resource Sharing (STARS) | ||
Brett Lynch STARS ENCLOSURE 1 | |||
Diablo Canyon Nuclear Power Plant, Units 1 and 2 License Renewal Application Draft Request for Additional Information Metal Fatigue D-RAI4.3-8 | |||
==Background:== | |||
In the license renewal application (LRA) Table 4.3-1, the applicant credits the "Global" monitoring (i.e., cycle count monitoring) of aging management program (AMP) B3.1 as the 10 CFR 54.21 (c)(1)(iii) aging management monitoring basis for dispositioning the cumulative usage factor (CUF) analyses for the reactor pressure vessel (RPV) Core Support Pads, Pressurizer Spray Nozzle, and Pressurizer Heater Penetration. | |||
Issue: | |||
The LRA Table 4.3-1 or LRA Table 4.3-6 indicated that the RPV Core Support Pads, Pressurizer Spray Nozzle, and Pressurizer Heater Penetration in Unit 1 have a maximum limiting design basis CUFs of -0.89, -0.95, and -0.94 respectively and limiting 60-year projected CUFs of -1.07, -1.14, and -2.97. | |||
Reguest: | |||
Justify your basis using the "Global" monitoring method of AMP B3.1 to monitor these components during the period of extended operation in accordance with 10 CFR 54.21 (c)(1)(iii), | |||
and why it would not be more appropriate to monitor for these components using the cycle based fatigue (CBF) monitoring method. | |||
Discussion: Based on discussion with the applicant, the staff determined that the Unit 1 pressurizer heater penetration 60-year projected CUF value was 0.9391, not 2.97, as indicated in LRA Table 4.3-6. The staff will revise the question as follows. The revised question will be sent as a formal RAI. | |||
RAI4.3-8 | |||
==Background:== | |||
In the LRA Table 4.3-1, the applicant credits the "Global" monitoring (Le. cycle count monitoring) of AMP 83.1 as the 10 CFR 54.21 (c)(1)(iii) aging management monitoring basis for dispositioning the CUF analyses for the RPV Core Support Pads, Pressurizer Spray Nozzle, and Pressurizer Heater Penetration. | |||
Issue: | |||
The LRA Table 4.3-1 or LRA Table 4.3-6 indicated that the RPV Core Support Pads, Pressurizer Spray Nozzle, and Pressurizer Heater Penetration in Unit 1 have a maximum limiting design basis CUFs of -0.89, -0.95, and -0.94 respectively and limiting 60-year projected CUFs of -1.07, -1.14, and -0.9391. | |||
Request: | |||
Justify your basis for using the "Global" monitoring method of AMP B3.1 to monitor these components during the period of extended operation in accordance with 10 CFR 54.21 (c)(1)(iii), and why it would not be more appropriate to monitor for these components using the CBF monitoring method. | |||
ENCLOSURE 2 | |||
August 27.2010 LICENSEE: Pacific Gas and Electric Company FACILITY: Diablo Canyon Nuclear Power Plant, Units 1 and 2 SUB..IECT: | |||
==SUMMARY== | ==SUMMARY== | ||
OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 17, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION | OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 17, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION - METAL FATIGUE The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E) held a telephone conference call on August 17, 2010, to obtain clarification on the staff's draft request for additional information (D-RAI) regarding the Diablo Canyon Nuclear Power Plant license renewal application (LRA). | ||
-METAL FATIGUE The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E) held a telephone conference call on August 17, 2010, to obtain clarification on the staff's draft request for additional information (D-RAI) regarding the Diablo Canyon Nuclear Power Plant license renewal application (LRA). Bye-mail dated August 4, 2010. the staff sent D-RAls to PG&E regarding metal fatigue time limited aging analysis review. PG&E reviewed the information contained therein, and requested a telephone conference call. The telephone conference call was useful in clarifying the intent of the staff's D-RAls. Enclosure 1 provides a listing of the participants. | Bye-mail dated August 4, 2010. the staff sent D-RAls to PG&E regarding metal fatigue time limited aging analysis review. PG&E reviewed the information contained therein, and requested a telephone conference call. The telephone conference call was useful in clarifying the intent of the staff's D-RAls. Enclosure 1 provides a listing of the participants. Enclosure 2 provides discussions on D-RAls for which the applicant requested clarification. No changes to other D-RAls were necessary as a result of this telephone conference call. Formal RAls will be issued by a separate letter. | ||
Enclosure 2 provides discussions on D-RAls for which the applicant requested clarification. | The applicant had an opportunity to comment on this summary. | ||
No changes to other D-RAls were necessary as a result of this telephone conference call. Formal RAls will be issued by a separate letter. The applicant had an opportunity to comment on this summary. IRA! Nathaniel Ferrer, Safety Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323 | IRA! | ||
Nathaniel Ferrer, Safety Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323 | |||
==Enclosures:== | ==Enclosures:== | ||
As stated cc w/encls: Distribution via Listserv DISTRIBUTION: | As stated cc w/encls: Distribution via Listserv DISTRIBUTION: | ||
See next page ADAMS Accession No.: ML102310526 OFFICE PM:RPB2:DLR BC:RPB2:DLR PM:RPB2:DLR NAME IKing NFerrer DWrona NFerrer DATE 08/25/10 08/25/10 08/26/10 08/27/10 OFFICIAL RECORD COpy Letter to John Conway from Nathaniel B. Ferrer dated August 27, 2010 | See next page ADAMS Accession No.: ML102310526 OFFICE ~DLR PM:RPB2:DLR BC:RPB2:DLR PM:RPB2:DLR NAME IKing NFerrer DWrona NFerrer DATE 08/25/10 08/25/10 08/26/10 08/27/10 OFFICIAL RECORD COpy | ||
Letter to John Conway from Nathaniel B. Ferrer dated August 27, 2010 | |||
==SUBJECT:== | |||
==SUMMARY== | ==SUMMARY== | ||
OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 17, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION | OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 17, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION - METAL FATIGUE DISTRIBUTION: | ||
-METAL FATIGUE DISTRIBUTION: | HARD COPY: | ||
HARD COPY: DLRRF E*MAlL: PUBLICRidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRarb Resource RidsNrrDlrRapb Resource RidsNrrDlrRasb Resource RidsNrrDlrRerb Resource RidsNrrDlrRpob Resource RidsOgcMailCenter Resource NFerrer KGreen AStuyvenberg DWrona AWang MPeck, RIV TBrown, RI GMiller, RIV NO'Keefe, RIV ICouret,OPA VDricks,OPA WMaier, RIV JWeil,OCA EWiliiamson, OGC SUttal,OGC RRihm, EDO}} | DLRRF E*MAlL: | ||
PUBLICRidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRarb Resource RidsNrrDlrRapb Resource RidsNrrDlrRasb Resource RidsNrrDlrRerb Resource RidsNrrDlrRpob Resource RidsOgcMailCenter Resource NFerrer KGreen AStuyvenberg DWrona AWang MPeck, RIV TBrown, RI GMiller, RIV NO'Keefe, RIV ICouret,OPA VDricks,OPA WMaier, RIV JWeil,OCA EWiliiamson, OGC SUttal,OGC RRihm, EDO}} |
Revision as of 14:19, 13 November 2019
ML102310526 | |
Person / Time | |
---|---|
Site: | Diablo Canyon ![]() |
Issue date: | 08/27/2010 |
From: | Ferrer N License Renewal Projects Branch 2 |
To: | |
Ferrer, N B, NRR/DLR, 415-1045 | |
References | |
Download: ML102310526 (5) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555*0001 August 27,2010 LICENSEE: Pacific Gas and Electric Company FACILITY: Diablo Canyon Nuclear Power Plant, Units 1 and 2
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 17, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION - METAL FATIGUE The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E) held a telephone conference call on August 17, 2010, to obtain clarification on the staff's draft request for additional information (D-RAI) regarding the Diablo Canyon Nuclear Power Plant license renewal application (LRA).
Bye-mail dated August 4,2010, the staff sent D-RAls to PG&E regarding metal fatigue time limited aging analysis review. PG&E reviewed the information contained therein, and requested a telephone conference call. The telephone conference call was useful in clarifying the intent of the staff's D-RAls. Enclosure 1 provides a listing of the participants. Enclosure 2 provides discussions on D-RAls for which the applicant requested clarification. No changes to other D-RAls were necessary as a result of this telephone conference call. Formal RAls will be issued by a separate letter.
The applicant had an opportunity to comment on this summary.
Nathaniel Ferrer, Safety Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323
Enclosures:
As stated cc w/encls: Distribution via Listserv
TELEPHONE CONFERENCE CALL DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS AUGUST 17, 2010 PARTICIPANTS AFFILIATIONS Nate Ferrer U.S. Nuclear Regulatory Commission (NRC)
James Medoff !\IRC Todd Mintz Center for Nuclear Waste Regulatory Analyses Philippe Soenen Pacific Gas and Electric Company (PG&E)
Michelle Albright PG&E Kevin Braico PG&E Dave Kunsemiller Strategic Teaming And Resource Sharing (STARS)
Brett Lynch STARS ENCLOSURE 1
Diablo Canyon Nuclear Power Plant, Units 1 and 2 License Renewal Application Draft Request for Additional Information Metal Fatigue D-RAI4.3-8
Background:
In the license renewal application (LRA) Table 4.3-1, the applicant credits the "Global" monitoring (i.e., cycle count monitoring) of aging management program (AMP) B3.1 as the 10 CFR 54.21 (c)(1)(iii) aging management monitoring basis for dispositioning the cumulative usage factor (CUF) analyses for the reactor pressure vessel (RPV) Core Support Pads, Pressurizer Spray Nozzle, and Pressurizer Heater Penetration.
Issue:
The LRA Table 4.3-1 or LRA Table 4.3-6 indicated that the RPV Core Support Pads, Pressurizer Spray Nozzle, and Pressurizer Heater Penetration in Unit 1 have a maximum limiting design basis CUFs of -0.89, -0.95, and -0.94 respectively and limiting 60-year projected CUFs of -1.07, -1.14, and -2.97.
Reguest:
Justify your basis using the "Global" monitoring method of AMP B3.1 to monitor these components during the period of extended operation in accordance with 10 CFR 54.21 (c)(1)(iii),
and why it would not be more appropriate to monitor for these components using the cycle based fatigue (CBF) monitoring method.
Discussion: Based on discussion with the applicant, the staff determined that the Unit 1 pressurizer heater penetration 60-year projected CUF value was 0.9391, not 2.97, as indicated in LRA Table 4.3-6. The staff will revise the question as follows. The revised question will be sent as a formal RAI.
RAI4.3-8
Background:
In the LRA Table 4.3-1, the applicant credits the "Global" monitoring (Le. cycle count monitoring) of AMP 83.1 as the 10 CFR 54.21 (c)(1)(iii) aging management monitoring basis for dispositioning the CUF analyses for the RPV Core Support Pads, Pressurizer Spray Nozzle, and Pressurizer Heater Penetration.
Issue:
The LRA Table 4.3-1 or LRA Table 4.3-6 indicated that the RPV Core Support Pads, Pressurizer Spray Nozzle, and Pressurizer Heater Penetration in Unit 1 have a maximum limiting design basis CUFs of -0.89, -0.95, and -0.94 respectively and limiting 60-year projected CUFs of -1.07, -1.14, and -0.9391.
Request:
Justify your basis for using the "Global" monitoring method of AMP B3.1 to monitor these components during the period of extended operation in accordance with 10 CFR 54.21 (c)(1)(iii), and why it would not be more appropriate to monitor for these components using the CBF monitoring method.
ENCLOSURE 2
August 27.2010 LICENSEE: Pacific Gas and Electric Company FACILITY: Diablo Canyon Nuclear Power Plant, Units 1 and 2 SUB..IECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 17, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION - METAL FATIGUE The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E) held a telephone conference call on August 17, 2010, to obtain clarification on the staff's draft request for additional information (D-RAI) regarding the Diablo Canyon Nuclear Power Plant license renewal application (LRA).
Bye-mail dated August 4, 2010. the staff sent D-RAls to PG&E regarding metal fatigue time limited aging analysis review. PG&E reviewed the information contained therein, and requested a telephone conference call. The telephone conference call was useful in clarifying the intent of the staff's D-RAls. Enclosure 1 provides a listing of the participants. Enclosure 2 provides discussions on D-RAls for which the applicant requested clarification. No changes to other D-RAls were necessary as a result of this telephone conference call. Formal RAls will be issued by a separate letter.
The applicant had an opportunity to comment on this summary.
IRA!
Nathaniel Ferrer, Safety Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323
Enclosures:
As stated cc w/encls: Distribution via Listserv DISTRIBUTION:
See next page ADAMS Accession No.: ML102310526 OFFICE ~DLR PM:RPB2:DLR BC:RPB2:DLR PM:RPB2:DLR NAME IKing NFerrer DWrona NFerrer DATE 08/25/10 08/25/10 08/26/10 08/27/10 OFFICIAL RECORD COpy
Letter to John Conway from Nathaniel B. Ferrer dated August 27, 2010
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 17, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION - METAL FATIGUE DISTRIBUTION:
HARD COPY:
DLRRF E*MAlL:
PUBLICRidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRarb Resource RidsNrrDlrRapb Resource RidsNrrDlrRasb Resource RidsNrrDlrRerb Resource RidsNrrDlrRpob Resource RidsOgcMailCenter Resource NFerrer KGreen AStuyvenberg DWrona AWang MPeck, RIV TBrown, RI GMiller, RIV NO'Keefe, RIV ICouret,OPA VDricks,OPA WMaier, RIV JWeil,OCA EWiliiamson, OGC SUttal,OGC RRihm, EDO