ML061070094: Difference between revisions
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 2: | Line 2: | ||
| number = ML061070094 | | number = ML061070094 | ||
| issue date = 05/01/2006 | | issue date = 05/01/2006 | ||
| title = | | title = Summary of Meeting with PG&E Regarding Digital Upgrade Project | ||
| author name = Wang A | | author name = Wang A | ||
| author affiliation = NRC/NRR/ADRO/DORL | | author affiliation = NRC/NRR/ADRO/DORL | ||
| addressee name = Terao D | | addressee name = Terao D | ||
| Line 9: | Line 9: | ||
| docket = 05000275, 05000323 | | docket = 05000275, 05000323 | ||
| license number = DPR-080, DPR-082 | | license number = DPR-080, DPR-082 | ||
| contact person = Wang A | | contact person = Wang A | ||
| case reference number = TAC MD0385, TAC MD0386 | | case reference number = TAC MD0385, TAC MD0386 | ||
| document type = Meeting Summary | | document type = Meeting Summary | ||
| Line 18: | Line 18: | ||
=Text= | =Text= | ||
{{#Wiki_filter:May 1, | {{#Wiki_filter:May 1, 2006 MEMORANDUM TO: David Terao, Chief Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: Alan B. Wang, Project Manager /RA/ | ||
Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation | |||
==SUBJECT:== | ==SUBJECT:== | ||
==SUMMARY== | ==SUMMARY== | ||
OF MARCH 16, 2006, MEETING WITH PACIFIC GAS | OF MARCH 16, 2006, MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY (PG&E) ON DIGITAL UPGRADE PROJECT (TAC NOS. MD0385 and MD0386) | ||
On March 16, 2006, the Nuclear Regulatory Commission (NRC) staff conducted a meeting with PG&E to discuss a digital upgrade project for Diablo Canyon Power Plant, Units 1 and 2 (DCPP). This meeting had an open and closed session. | |||
PG&E stated that it had proposed this meeting to start a dialog with the NRC staff to discuss its digital upgrade project for the DCPP. PG&E wanted to establish some lines of communication with the staff on this future upgrade. Allen Howe stated that the NRC agreed to this meeting to gather information about PG&Es digital upgrade project and that no decisions about the scope or acceptability of the project would be made as a result of this meeting. | |||
PG&E explained the need for the upgrade and its long-term strategy. PG&E noted that this would be a hybrid system for a time during installation. There are too many systems affected for them all to be changed in a single outage, and, therefore, there will be a transitional period wherein some but not all of the new equipment will be installed. There would be some limited technical specification changes required. The amendment for these changes is scheduled to be submitted in July 2007. The replacement is currently scheduled for the fall of 2009 for Unit 2 and 2010 for Unit 1. However, PG&E stated that NRC acceptance of the proposed architecture is needed before detailed design would start. PG&E is investigating various options for accomplishing this NRC review. PG&E is considering submitting a plant-specific Topical Report or an unreviewed safety question amendment for this purpose. PG&E has proposed to have a technical discussion of the proposed changes onsite this summer when more detail of the digital upgrade project has been defined. | |||
The NRC staff indicated concern over the reduction of protection/control diversity that would result from the proposed use of the same platform design in various protection systems and control systems. The NRC staff also noted that the reduction in the variety of system designs, presented as beneficial from a maintenance and economic standpoint, results in reduced diversity. The NRC staff stated, for example, control and protection systems are typically not subject to common-mode failures, but that the proposed use of the same platform design could introduce the possibility of common-mode failures. Presently, control and protection systems protect safety limits individually. If they are combined and are subject to common-mode | |||
failures, then they will no longer be able to back each other up. The NRC staff pointed out that this reduced diversity could have a negative impact upon the overall level of plant safety. The licensee believes that the consolidation would be benign from a safety standpoint and that this issue will be addressed in its D3 analysis. | |||
The NRC staff thanked the licensee for the presentation and agreed that a followup meeting would be appropriate. Members of the public were not in attendance. A list of attendees is attached. The non-proprietary presentation slides are available in the Agencywide Documents Access and Management System under accession number ML060860251. | |||
==Enclosure:== | ==Enclosure:== | ||
List of Meeting Attendees cc w/encl: | List of Meeting Attendees cc w/encl: See next page Docket Nos. 50-275 and 50-323 | ||
failures, then they will no longer be able to back each other up. The NRC staff pointed out that this reduced diversity could have a negative impact upon the overall level of plant safety. The licensee believes that the consolidation would be benign from a safety standpoint and that this issue will be addressed in its D3 analysis. | |||
The NRC staff thanked the licensee for the presentation and agreed that a followup meeting would be appropriate. Members of the public were not in attendance. A list of attendees is attached. The non-proprietary presentation slides are available in the Agencywide Documents Access and Management System under accession number ML060860251. | |||
==Enclosure:== | ==Enclosure:== | ||
List of Meeting Attendees cc w/encl: | List of Meeting Attendees cc w/encl: See next page Docket Nos. 50-275 and 50-323 DISTRIBUTION: | ||
PUBLIC RidsNrrDeEicb (AHowe) RJasinski LPLIV Reading PRebstock, NRR/ADES MWaterman, NRR/ADES RidsNrrDorl PLoeser, NRR/ADES BKemper, RES RidsNrrDorlLpl4 CDoutt, NRR/ADRA SArndt, RES RidsNrrPMAWang JBongara, NRR/ADRO RidsOgcRp MChiramal, NRR/ADES RidsAcrsAcnwMailCenter ACCESSION NO.: NRC-001 OFFICE NRR/LPL4/PM NRR/LPL4/LA NRR/DE/EICB/BC NRR/LPL4/BC NAME AWang;mxr4 LFeizollahi AHowe (w/edits) DTerao DATE 4/28/06 4/27/06 4/26/2006 5/1/06 OFFICIAL RECORD COPY | |||
MEETING WITH PACIFIC GAS AND ELECTRIC (PG&E) | |||
LIST OF ATTENDEES March 16, 2006 PG&E Westinghouse INVENSYS Altran D. Jacobs J. Mauck C. Scott T. Quinn T. Grozan L. Erin J. Murray T. Harris S. Patterson J. Hefler NRC A. Howe D. Terao A. Wang M. Waterman P. Loeser B. Kemper S. Arndt C. Doutt P. Rebstock J. Bongara M. Chiramal ENCLOSURE | |||
P.O. Box 3 Avila Beach, CA | Diablo Canyon Power Plant, Units 1 and 2 cc: | ||
NRC Resident Inspector Richard F. Locke, Esq. | |||
Diablo Canyon Power Plant Pacific Gas & Electric Company c/o U.S. Nuclear Regulatory Commission P.O. Box 7442 P.O. Box 369 San Francisco, CA 94120 Avila Beach, CA 93424 City Editor Sierra Club San Lucia Chapter The Tribune ATTN: Andrew Christie 3825 South Higuera Street P.O. Box 15755 P.O. Box 112 San Luis Obispo, CA 93406 San Luis Obispo, CA 93406-0112 Ms. Nancy Culver Director, Radiologic Health Branch San Luis Obispo State Department of Health Services Mothers for Peace P.O. Box 997414, MS 7610 P.O. Box 164 Sacramento, CA 95899-7414 Pismo Beach, CA 93448 Mr. James D. Boyd, Commissioner Chairman California Energy Commission San Luis Obispo County 1516 Ninth Street (MS 31) | |||
Board of Supervisors Sacramento, CA 95814 1055 Monterey Street, Suite D430 San Luis Obispo, CA 93408 Mr. James R. Becker, Vice President Diablo Canyon Operations Mr. Truman Burns and Station Director Mr. Robert Kinosian Diablo Canyon Power Plant California Public Utilities Commission P.O. Box 3 505 Van Ness, Room 4102 Avila Beach, CA 93424 San Francisco, CA 94102 Jennifer Tang Diablo Canyon Independent Safety Field Representative Committee United States Senator Barbara Boxer ATTN: Robert R. Wellington, Esq. 1700 Montgomery Street, Suite 240 Legal Counsel San Francisco, CA 94111 857 Cass Street, Suite D Monterey, CA 93940 Mr. John S. Keenan Senior Vice President - Generation Regional Administrator, Region IV and Chief Nuclear Officer U.S. Nuclear Regulatory Commission Pacific Gas and Electric Company Harris Tower & Pavillion Diablo Canyon Power Plant 611 Ryan Plaza Drive, Suite 400 P.O. Box 770000, Mail Code B32 Arlington, TX 76011-8064 San Francisco, CA 94177-0001}} | |||
Latest revision as of 20:35, 7 December 2019
| ML061070094 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 05/01/2006 |
| From: | Wang A Plant Licensing Branch III-2 |
| To: | Terao D Plant Licensing Branch III-2 |
| Wang A | |
| References | |
| TAC MD0385, TAC MD0386 | |
| Download: ML061070094 (5) | |
Text
May 1, 2006 MEMORANDUM TO: David Terao, Chief Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM: Alan B. Wang, Project Manager /RA/
Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF MARCH 16, 2006, MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY (PG&E) ON DIGITAL UPGRADE PROJECT (TAC NOS. MD0385 and MD0386)
On March 16, 2006, the Nuclear Regulatory Commission (NRC) staff conducted a meeting with PG&E to discuss a digital upgrade project for Diablo Canyon Power Plant, Units 1 and 2 (DCPP). This meeting had an open and closed session.
PG&E stated that it had proposed this meeting to start a dialog with the NRC staff to discuss its digital upgrade project for the DCPP. PG&E wanted to establish some lines of communication with the staff on this future upgrade. Allen Howe stated that the NRC agreed to this meeting to gather information about PG&Es digital upgrade project and that no decisions about the scope or acceptability of the project would be made as a result of this meeting.
PG&E explained the need for the upgrade and its long-term strategy. PG&E noted that this would be a hybrid system for a time during installation. There are too many systems affected for them all to be changed in a single outage, and, therefore, there will be a transitional period wherein some but not all of the new equipment will be installed. There would be some limited technical specification changes required. The amendment for these changes is scheduled to be submitted in July 2007. The replacement is currently scheduled for the fall of 2009 for Unit 2 and 2010 for Unit 1. However, PG&E stated that NRC acceptance of the proposed architecture is needed before detailed design would start. PG&E is investigating various options for accomplishing this NRC review. PG&E is considering submitting a plant-specific Topical Report or an unreviewed safety question amendment for this purpose. PG&E has proposed to have a technical discussion of the proposed changes onsite this summer when more detail of the digital upgrade project has been defined.
The NRC staff indicated concern over the reduction of protection/control diversity that would result from the proposed use of the same platform design in various protection systems and control systems. The NRC staff also noted that the reduction in the variety of system designs, presented as beneficial from a maintenance and economic standpoint, results in reduced diversity. The NRC staff stated, for example, control and protection systems are typically not subject to common-mode failures, but that the proposed use of the same platform design could introduce the possibility of common-mode failures. Presently, control and protection systems protect safety limits individually. If they are combined and are subject to common-mode
failures, then they will no longer be able to back each other up. The NRC staff pointed out that this reduced diversity could have a negative impact upon the overall level of plant safety. The licensee believes that the consolidation would be benign from a safety standpoint and that this issue will be addressed in its D3 analysis.
The NRC staff thanked the licensee for the presentation and agreed that a followup meeting would be appropriate. Members of the public were not in attendance. A list of attendees is attached. The non-proprietary presentation slides are available in the Agencywide Documents Access and Management System under accession number ML060860251.
Enclosure:
List of Meeting Attendees cc w/encl: See next page Docket Nos. 50-275 and 50-323
failures, then they will no longer be able to back each other up. The NRC staff pointed out that this reduced diversity could have a negative impact upon the overall level of plant safety. The licensee believes that the consolidation would be benign from a safety standpoint and that this issue will be addressed in its D3 analysis.
The NRC staff thanked the licensee for the presentation and agreed that a followup meeting would be appropriate. Members of the public were not in attendance. A list of attendees is attached. The non-proprietary presentation slides are available in the Agencywide Documents Access and Management System under accession number ML060860251.
Enclosure:
List of Meeting Attendees cc w/encl: See next page Docket Nos. 50-275 and 50-323 DISTRIBUTION:
PUBLIC RidsNrrDeEicb (AHowe) RJasinski LPLIV Reading PRebstock, NRR/ADES MWaterman, NRR/ADES RidsNrrDorl PLoeser, NRR/ADES BKemper, RES RidsNrrDorlLpl4 CDoutt, NRR/ADRA SArndt, RES RidsNrrPMAWang JBongara, NRR/ADRO RidsOgcRp MChiramal, NRR/ADES RidsAcrsAcnwMailCenter ACCESSION NO.: NRC-001 OFFICE NRR/LPL4/PM NRR/LPL4/LA NRR/DE/EICB/BC NRR/LPL4/BC NAME AWang;mxr4 LFeizollahi AHowe (w/edits) DTerao DATE 4/28/06 4/27/06 4/26/2006 5/1/06 OFFICIAL RECORD COPY
MEETING WITH PACIFIC GAS AND ELECTRIC (PG&E)
LIST OF ATTENDEES March 16, 2006 PG&E Westinghouse INVENSYS Altran D. Jacobs J. Mauck C. Scott T. Quinn T. Grozan L. Erin J. Murray T. Harris S. Patterson J. Hefler NRC A. Howe D. Terao A. Wang M. Waterman P. Loeser B. Kemper S. Arndt C. Doutt P. Rebstock J. Bongara M. Chiramal ENCLOSURE
Diablo Canyon Power Plant, Units 1 and 2 cc:
NRC Resident Inspector Richard F. Locke, Esq.
Diablo Canyon Power Plant Pacific Gas & Electric Company c/o U.S. Nuclear Regulatory Commission P.O. Box 7442 P.O. Box 369 San Francisco, CA 94120 Avila Beach, CA 93424 City Editor Sierra Club San Lucia Chapter The Tribune ATTN: Andrew Christie 3825 South Higuera Street P.O. Box 15755 P.O. Box 112 San Luis Obispo, CA 93406 San Luis Obispo, CA 93406-0112 Ms. Nancy Culver Director, Radiologic Health Branch San Luis Obispo State Department of Health Services Mothers for Peace P.O. Box 997414, MS 7610 P.O. Box 164 Sacramento, CA 95899-7414 Pismo Beach, CA 93448 Mr. James D. Boyd, Commissioner Chairman California Energy Commission San Luis Obispo County 1516 Ninth Street (MS 31)
Board of Supervisors Sacramento, CA 95814 1055 Monterey Street, Suite D430 San Luis Obispo, CA 93408 Mr. James R. Becker, Vice President Diablo Canyon Operations Mr. Truman Burns and Station Director Mr. Robert Kinosian Diablo Canyon Power Plant California Public Utilities Commission P.O. Box 3 505 Van Ness, Room 4102 Avila Beach, CA 93424 San Francisco, CA 94102 Jennifer Tang Diablo Canyon Independent Safety Field Representative Committee United States Senator Barbara Boxer ATTN: Robert R. Wellington, Esq. 1700 Montgomery Street, Suite 240 Legal Counsel San Francisco, CA 94111 857 Cass Street, Suite D Monterey, CA 93940 Mr. John S. Keenan Senior Vice President - Generation Regional Administrator, Region IV and Chief Nuclear Officer U.S. Nuclear Regulatory Commission Pacific Gas and Electric Company Harris Tower & Pavillion Diablo Canyon Power Plant 611 Ryan Plaza Drive, Suite 400 P.O. Box 770000, Mail Code B32 Arlington, TX 76011-8064 San Francisco, CA 94177-0001