Letter Sequence Meeting |
|---|
|
|
MONTHYEARML16341F7021990-05-18018 May 1990
Notification of 900606 Meeting W/Util in Rockville,Md to Discuss Seismic Design of Masonry Wall & Util Response to Request for Addl Info
Project stage: RAI
ML18095B0321990-11-14014 November 1990
Notification of 901127 Meeting W/Util in Rockville,Md to Discuss Seismic Design of Masonry Walls at Facilities
Project stage: Meeting
ML16341F9011990-12-0707 December 1990
Summary of 901127 Meeting W/Util in Rockville,Md Re Seismic Design of Masonry Walls at Facilities.Topics Discussed Included Plant Walkdowns,Reanalysis of Top Connection & Wall Fixture & Methods of Strengthening Walls.Viewgraphs Encl
Project stage: Meeting
1990-12-07
[Table View] |
|
|---|
Category:MEETING MINUTES & NOTES--CORRESPONDENCE
MONTHYEARML16342A9051999-09-22022 September 1999
Summary of 990909 Meeting with Pg&E,Tu,Uec & WCNOC Re Licensee Lessons Learned from Joint Effort to Convert Current TS to Improved TS for Listed Facilities.List of Meeting Attendees & Handout Provided by Licensees Encl
ML16342D9921998-02-0303 February 1998
Summary of 971222 Meeting W/Pg&E in Rockville,Md Re Sale of Morro Bay Power Plant & Offsite Power Sys Improvements. List of Attendees & Licensee Handouts Encl
ML17083C6411997-05-0101 May 1997
Summary of 970325 Meeting W/Util to Discuss Auxiliary Saltwater Sys Bypass Mod & RCS Flow Measurement Instrumentation.W/List of Attendees & Handout
ML16343A4681997-01-15015 January 1997
Summary of 961114 Meeting W/Tue,Ue,Wcnoc & PG&E Re Joint TS Conversion Status & Schedule.List of Attendees Encl
ML20129J5741996-11-0505 November 1996
Trip Rept of 961001-03 Visit to Omega Point Labs in San Antonio,Tx to Witness Three Fire Endurance Tests Conducted for PG&E
ML16342D4311996-09-16016 September 1996
Summary of 960823 Meeting W/Tu Electric,Ue,Wcnoc & PG&E in Rockville,Md Re Joint TS Conversion Process & Schedule.List of Attendees & Draft Application Guidance Encl
ML16342D3891996-07-26026 July 1996
Summary of 960223 Meeting W/Utils in Rockville,Md Re Utils Destructive Exam of Intergrity Analysis & Taking Credit for Addressing Intergrity of Specific Types of Indications Located at Elevations.List of Attendees & Hondouts Encl
ML16342D2351996-03-0404 March 1996
Summary of 951214 Meeting W/Utils in Rockville,Md Re Joint TS Conversion Process & Schedule.List of Attendees & Matl Used in Presentation Encl
ML16342C7511994-11-22022 November 1994
Summary of 941110 Meeting W/Utils Re Training & Operator Licensing Issues.List of Attendees,Meeting Agenda & Handouts Encl
ML16342A4211994-02-15015 February 1994
Summary of 940112 Meeting W/Util in Rockville,Md Re Licensee Proposed TS Amend Re Cooling Flow to Containment Fan Cooler Units
ML16342A3941994-02-0404 February 1994
Summary of 940112 Meeting W/Pg&E in Rockville,Md Re Partial Implementation of Improved Standard Tech Specs. Southern Technical Svcs Also Attended
ML16342A2231993-08-18018 August 1993
Summary of 930810 Meeting W/Util in Rockville,Md to Discuss Licensee Proposed Eagle 21 Process Protection Sys Upgrade & Diversity from ATWS Mitigation Sys
ML16342A1041993-05-12012 May 1993
Summary of 930429 Meeting W/Pg&E in Rockville,Md Re Implementation of Improved Std TS & Generic Amends for Plant.List of Attendees Encl
ML20035B4531993-03-18018 March 1993
Summary of Operator Reactors Events Briefing 93-10 on 930317.List of Attendees Encl
ML16341G8021992-12-17017 December 1992
Summary of Public Meeting on 921119 to Discuss Licensee Reg Guide 1.97 Review Project
ML16341G7621992-11-16016 November 1992
Summary of 921028 Meeting W/Util in Rockville,Maryland Re Future Changes to Diablo Canyon TS
ML16341G7291992-10-23023 October 1992
Summary of 920923 Meeting in Rockville,Md Re Dententioning Rv Head Bolts to Serve as Vent Path During mid-loop Operation at Diablo Canyon.List of Attendees & Viewgraphs Encl
ML16342B8661992-03-19019 March 1992
Summary of 920225 Meeting W/Util in Rockville,Md Re Analysis by Util to Resolve long-term Seismic Program Confirmatory Item
ML16341F9611991-02-20020 February 1991
Summary of 910111 Staff Meeting W/Licensee in Rockville,Md to Discuss Proposed License Amends LAR 90-13 & LAR 90-15. Attendees Listed in Encl 1
ML16341F9011990-12-0707 December 1990
Summary of 901127 Meeting W/Util in Rockville,Md Re Seismic Design of Masonry Walls at Facilities.Topics Discussed Included Plant Walkdowns,Reanalysis of Top Connection & Wall Fixture & Methods of Strengthening Walls.Viewgraphs Encl
ML16341F5681990-02-22022 February 1990
Summary of 900130 Meeting W/Util in Rockville,Md Re License Amend Request to Disable One Pressurizer Safety Valve in Event of Valve Leak
ML16341F4841989-12-22022 December 1989
Summary of 891205 Public Meeting W/Util,Westinghouse & Bechtel in Rockville,Md Re Gagging One of Three Pressurizer Safety Relief Valves & Creation of Tech Specs Re Specified Atmospheric Dump Valves.Attendees List & Viewgraphs Encl
ML19325E1761989-10-24024 October 1989
Summary of Operating Reactors Events Meeting 89-37 on 891018.List of Attendees & Events Briefing Encl
ML16341F3071989-08-29029 August 1989
Summary of 890808 Meeting W/Util in Rockville,Md Re Util Proposed Amend Request to Delete Certain cycle-specific Parameters from Plant Tech Specs.Attendance List & Handout Encl
ML20245F9261989-08-0707 August 1989
Summary of 890613-15 Meetings W/Util in San Francisco,Ca Re PRA long-term Seismic Program.List of Attendees & Agenda Encl
ML16341F2711989-08-0101 August 1989
Summary of 890612-16 Meetings W/Pg&E & Other Listed Companies in San Francisco,Ca Re Geology/Seismology/ Geophysics/Tectonics long-term Program.Agenda & Attendee List Encl
ML16342C3551989-07-24024 July 1989
Summary of 890720 Public Meeting W/Util in Rockville,Md Re Potential License Amend Request to Permit Disabling of One Pressurizer Safety Valve in Event of Leak.List of Attendees & Viewgraphs Encl
ML20247K0901989-05-23023 May 1989
Summary of 890517 Meeting W/Inpo Re Similarities & Differences Between Performance Indicator Programs.Detailed Discussion Encl
ML20247K1011989-05-16016 May 1989
Summary of 890517 Meeting W/Inpo in Bethesda,Md Re Similarities & Differences Between INPO & NRC Performance Indicators
ML16342B5371989-03-17017 March 1989
Summary of 890112 Public Meeting W/Nsss Owners Groups,Epri & NUMARC to Discuss Proposed NRC Bulletin on Cracked Studs. Agenda & List of Attendees Encl
ML16341F0341989-03-17017 March 1989
Summary of 890301-03 Meetings W/Util in San Francisco,Ca to Discuss Response to Seismic Ground Motion Questions,Per
ML20246N9201989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-010 on 890308.List of Attendees,Significant Events Identified for Input to NRC Performance Indicator Program & Summary of Reactor Scrams for Wk Ending 890305 Encl
ML16341E9601989-01-11011 January 1989
Summary of 890105 Meeting W/Util to Discuss Proposed Use of Vantage 5 Fuel Assemblies in Plant.Meeting Agenda & Viewgraphs Encl
ML17083C1371988-10-24024 October 1988
Summary of 881004 & 05 Meetings W/Util in Rockville,Md to Discuss Final Rept on long-term Seismic Program.Addl Info on Listed Items Must Be Submitted in Order to Continue Review of Rept.List of Attendees,Agenda & Viewgraphs Encl
ML20205H7521988-10-18018 October 1988
Summary of Operating Reactors Events Meeting 88-41 on 881018.No Significant Events Identified for Input to NRC Performance Indicator Program
ML16341E7751988-08-30030 August 1988
Summary of 880912-15 Meetings W/Util in Rockville,Md Re Overview of PRA for Seismic Reevaluation Program
ML20151D3481988-04-0707 April 1988
Summary of ACRS Subcommittee on Diablo Canyon Meeting on 880223-24 in Burlingame,Ca Re Review of Diablo Canyon Long Term Seismic Program
ML20148H6621988-01-15015 January 1988
Summary of Operating Reactors Events Meeting 88-02 on 880112 Re Events Which Occurred Since Last Meeting on 880105.List of Attendees,Significant Elements of Events & Tabulation of long-term Followup Assignments to Be Completed Encl
ML20148H6031987-12-15015 December 1987
Summary of ACRS DHR Sys Subcommittee 871117 Meeting in Washington,Dc Re Util Decision Not to Install Dedicated Blowdown Sys at Davis Besse & Implications of Diablo Canyon Loss of Shutdown Cooling Event.Viewgraphs Encl
ML16342C1951987-12-10010 December 1987
Summary of 871208 Meeting W/Util & Westinghouse Re Proposed Removal of Autoclosure Interlock on RHR Sys High/Low Pressure Interface Valves.Attendee List & Presentation Matl Encl
ML20245C2601987-08-0707 August 1987
Summary of CRGR Meeting 116 on 870610 Re Final Rule Amends to 10CFR30,40,50,51,70 & 72 Concerning Requirements for Decommissioning Facility.List of Attendees Encl
ML20195G3651987-08-0707 August 1987
Summary of CRGR Meeting 116 on 870610 Re Final Rule Amends to 10CFR30,40,50,51,70 & 72 Concerning Requirements for Decommissioning Facility.List of Attendees Encl
ML16341E3351987-07-13013 July 1987
Summary of 870603 Meeting W/Util & Bechtel Re Submergence Qualification of Minco Resistance Temp Detectors Installed in Reactor Vessel Level Indicating Sys.List of Attendees & Figure of Detector Encl
ML20215C8721987-06-0808 June 1987
Summary of Operating Reactors Events Meeting 87-10 on 870406 Re Events Which Occurred Since 870330 Meeting.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Reactor Scrams & Significant Events Encl
ML20214P6121987-05-27027 May 1987
Summary of Operating Reactors Events Meeting 87-14 on 870512 W/Nrr,Res,Aeod & Regional Ofcs Re Events Which Occurred Since 870507 Meeting.List of Attendees & Viewgraphs Encl
ML20215L3281987-05-0505 May 1987
Summary of Operating Reactors Events Meeting 87-11 on 870420.List of Attendees,Viewgraphs & Input to NRC Performance Indicator Program Encl
ML16341E1651987-04-10010 April 1987
Summary of 870326 Meeting W/Util,Franklin Research Ctr & BNL in Mount Laurel,Nj Re Spent Fuel Rack Analyses.List of Attendees Encl
ML16342B2881987-03-23023 March 1987
Summary of NRC 870304-05 Audit at Util Ofc in San Francisco, CA Re Pipeway Analyses & Calculations.List of Personnel Assisting in Audit & Info Provided by Util After Audit Encl
ML16341E1021987-03-10010 March 1987
Summary of 870218 Meeting W/Util & Franklin Research Ctr Re Spent Fuel Pool Expansion rack-to-rack Interactions & Licensee Response to NRC 870211 Request for Addl Listed Info.Attendance List Encl
ML17083B8631987-03-0505 March 1987
Summary of 861216 long-term Seismic Program Meeting W/Usgs Re Progress Made on Ground Motion Modelling Studies Undertaken by Util & Independent Study Undertaken by K Campbell on Behalf of NRC
1999-09-22
[Table view]
Category:MEETING SUMMARIES-INTERNAL (NON-TRANSCRIPT)
MONTHYEARML16342A9051999-09-22022 September 1999
Summary of 990909 Meeting with Pg&E,Tu,Uec & WCNOC Re Licensee Lessons Learned from Joint Effort to Convert Current TS to Improved TS for Listed Facilities.List of Meeting Attendees & Handout Provided by Licensees Encl
ML16342D9921998-02-0303 February 1998
Summary of 971222 Meeting W/Pg&E in Rockville,Md Re Sale of Morro Bay Power Plant & Offsite Power Sys Improvements. List of Attendees & Licensee Handouts Encl
ML17083C6411997-05-0101 May 1997
Summary of 970325 Meeting W/Util to Discuss Auxiliary Saltwater Sys Bypass Mod & RCS Flow Measurement Instrumentation.W/List of Attendees & Handout
ML16343A4681997-01-15015 January 1997
Summary of 961114 Meeting W/Tue,Ue,Wcnoc & PG&E Re Joint TS Conversion Status & Schedule.List of Attendees Encl
ML16342D4311996-09-16016 September 1996
Summary of 960823 Meeting W/Tu Electric,Ue,Wcnoc & PG&E in Rockville,Md Re Joint TS Conversion Process & Schedule.List of Attendees & Draft Application Guidance Encl
ML16342D3891996-07-26026 July 1996
Summary of 960223 Meeting W/Utils in Rockville,Md Re Utils Destructive Exam of Intergrity Analysis & Taking Credit for Addressing Intergrity of Specific Types of Indications Located at Elevations.List of Attendees & Hondouts Encl
ML16342D2351996-03-0404 March 1996
Summary of 951214 Meeting W/Utils in Rockville,Md Re Joint TS Conversion Process & Schedule.List of Attendees & Matl Used in Presentation Encl
ML16342C7511994-11-22022 November 1994
Summary of 941110 Meeting W/Utils Re Training & Operator Licensing Issues.List of Attendees,Meeting Agenda & Handouts Encl
ML16342A4211994-02-15015 February 1994
Summary of 940112 Meeting W/Util in Rockville,Md Re Licensee Proposed TS Amend Re Cooling Flow to Containment Fan Cooler Units
ML16342A3941994-02-0404 February 1994
Summary of 940112 Meeting W/Pg&E in Rockville,Md Re Partial Implementation of Improved Standard Tech Specs. Southern Technical Svcs Also Attended
ML16342A2231993-08-18018 August 1993
Summary of 930810 Meeting W/Util in Rockville,Md to Discuss Licensee Proposed Eagle 21 Process Protection Sys Upgrade & Diversity from ATWS Mitigation Sys
ML16342A1041993-05-12012 May 1993
Summary of 930429 Meeting W/Pg&E in Rockville,Md Re Implementation of Improved Std TS & Generic Amends for Plant.List of Attendees Encl
ML20035B4531993-03-18018 March 1993
Summary of Operator Reactors Events Briefing 93-10 on 930317.List of Attendees Encl
ML16341G8021992-12-17017 December 1992
Summary of Public Meeting on 921119 to Discuss Licensee Reg Guide 1.97 Review Project
ML16341G7621992-11-16016 November 1992
Summary of 921028 Meeting W/Util in Rockville,Maryland Re Future Changes to Diablo Canyon TS
ML16341G7291992-10-23023 October 1992
Summary of 920923 Meeting in Rockville,Md Re Dententioning Rv Head Bolts to Serve as Vent Path During mid-loop Operation at Diablo Canyon.List of Attendees & Viewgraphs Encl
ML16342B8661992-03-19019 March 1992
Summary of 920225 Meeting W/Util in Rockville,Md Re Analysis by Util to Resolve long-term Seismic Program Confirmatory Item
ML16341F9611991-02-20020 February 1991
Summary of 910111 Staff Meeting W/Licensee in Rockville,Md to Discuss Proposed License Amends LAR 90-13 & LAR 90-15. Attendees Listed in Encl 1
ML16341F9011990-12-0707 December 1990
Summary of 901127 Meeting W/Util in Rockville,Md Re Seismic Design of Masonry Walls at Facilities.Topics Discussed Included Plant Walkdowns,Reanalysis of Top Connection & Wall Fixture & Methods of Strengthening Walls.Viewgraphs Encl
ML16341F5681990-02-22022 February 1990
Summary of 900130 Meeting W/Util in Rockville,Md Re License Amend Request to Disable One Pressurizer Safety Valve in Event of Valve Leak
ML16341F4841989-12-22022 December 1989
Summary of 891205 Public Meeting W/Util,Westinghouse & Bechtel in Rockville,Md Re Gagging One of Three Pressurizer Safety Relief Valves & Creation of Tech Specs Re Specified Atmospheric Dump Valves.Attendees List & Viewgraphs Encl
ML19325E1761989-10-24024 October 1989
Summary of Operating Reactors Events Meeting 89-37 on 891018.List of Attendees & Events Briefing Encl
ML16341F3071989-08-29029 August 1989
Summary of 890808 Meeting W/Util in Rockville,Md Re Util Proposed Amend Request to Delete Certain cycle-specific Parameters from Plant Tech Specs.Attendance List & Handout Encl
ML20245F9261989-08-0707 August 1989
Summary of 890613-15 Meetings W/Util in San Francisco,Ca Re PRA long-term Seismic Program.List of Attendees & Agenda Encl
ML16341F2711989-08-0101 August 1989
Summary of 890612-16 Meetings W/Pg&E & Other Listed Companies in San Francisco,Ca Re Geology/Seismology/ Geophysics/Tectonics long-term Program.Agenda & Attendee List Encl
ML16342C3551989-07-24024 July 1989
Summary of 890720 Public Meeting W/Util in Rockville,Md Re Potential License Amend Request to Permit Disabling of One Pressurizer Safety Valve in Event of Leak.List of Attendees & Viewgraphs Encl
ML20247K0901989-05-23023 May 1989
Summary of 890517 Meeting W/Inpo Re Similarities & Differences Between Performance Indicator Programs.Detailed Discussion Encl
ML20247K1011989-05-16016 May 1989
Summary of 890517 Meeting W/Inpo in Bethesda,Md Re Similarities & Differences Between INPO & NRC Performance Indicators
ML16342B5371989-03-17017 March 1989
Summary of 890112 Public Meeting W/Nsss Owners Groups,Epri & NUMARC to Discuss Proposed NRC Bulletin on Cracked Studs. Agenda & List of Attendees Encl
ML16341F0341989-03-17017 March 1989
Summary of 890301-03 Meetings W/Util in San Francisco,Ca to Discuss Response to Seismic Ground Motion Questions,Per
ML20246N9201989-03-16016 March 1989
Summary of Operating Reactors Events Meeting 89-010 on 890308.List of Attendees,Significant Events Identified for Input to NRC Performance Indicator Program & Summary of Reactor Scrams for Wk Ending 890305 Encl
ML16341E9601989-01-11011 January 1989
Summary of 890105 Meeting W/Util to Discuss Proposed Use of Vantage 5 Fuel Assemblies in Plant.Meeting Agenda & Viewgraphs Encl
ML17083C1371988-10-24024 October 1988
Summary of 881004 & 05 Meetings W/Util in Rockville,Md to Discuss Final Rept on long-term Seismic Program.Addl Info on Listed Items Must Be Submitted in Order to Continue Review of Rept.List of Attendees,Agenda & Viewgraphs Encl
ML20205H7521988-10-18018 October 1988
Summary of Operating Reactors Events Meeting 88-41 on 881018.No Significant Events Identified for Input to NRC Performance Indicator Program
ML16341E7751988-08-30030 August 1988
Summary of 880912-15 Meetings W/Util in Rockville,Md Re Overview of PRA for Seismic Reevaluation Program
ML20151D3481988-04-0707 April 1988
Summary of ACRS Subcommittee on Diablo Canyon Meeting on 880223-24 in Burlingame,Ca Re Review of Diablo Canyon Long Term Seismic Program
ML20148H6621988-01-15015 January 1988
Summary of Operating Reactors Events Meeting 88-02 on 880112 Re Events Which Occurred Since Last Meeting on 880105.List of Attendees,Significant Elements of Events & Tabulation of long-term Followup Assignments to Be Completed Encl
ML20148H6031987-12-15015 December 1987
Summary of ACRS DHR Sys Subcommittee 871117 Meeting in Washington,Dc Re Util Decision Not to Install Dedicated Blowdown Sys at Davis Besse & Implications of Diablo Canyon Loss of Shutdown Cooling Event.Viewgraphs Encl
ML16342C1951987-12-10010 December 1987
Summary of 871208 Meeting W/Util & Westinghouse Re Proposed Removal of Autoclosure Interlock on RHR Sys High/Low Pressure Interface Valves.Attendee List & Presentation Matl Encl
ML20195G3651987-08-0707 August 1987
Summary of CRGR Meeting 116 on 870610 Re Final Rule Amends to 10CFR30,40,50,51,70 & 72 Concerning Requirements for Decommissioning Facility.List of Attendees Encl
ML20245C2601987-08-0707 August 1987
Summary of CRGR Meeting 116 on 870610 Re Final Rule Amends to 10CFR30,40,50,51,70 & 72 Concerning Requirements for Decommissioning Facility.List of Attendees Encl
ML16341E3351987-07-13013 July 1987
Summary of 870603 Meeting W/Util & Bechtel Re Submergence Qualification of Minco Resistance Temp Detectors Installed in Reactor Vessel Level Indicating Sys.List of Attendees & Figure of Detector Encl
ML20215C8721987-06-0808 June 1987
Summary of Operating Reactors Events Meeting 87-10 on 870406 Re Events Which Occurred Since 870330 Meeting.List of Attendees,Events Discussed & Significant Elements of Events & Summary of Reactor Scrams & Significant Events Encl
ML20214P6121987-05-27027 May 1987
Summary of Operating Reactors Events Meeting 87-14 on 870512 W/Nrr,Res,Aeod & Regional Ofcs Re Events Which Occurred Since 870507 Meeting.List of Attendees & Viewgraphs Encl
ML20215L3281987-05-0505 May 1987
Summary of Operating Reactors Events Meeting 87-11 on 870420.List of Attendees,Viewgraphs & Input to NRC Performance Indicator Program Encl
ML16341E1651987-04-10010 April 1987
Summary of 870326 Meeting W/Util,Franklin Research Ctr & BNL in Mount Laurel,Nj Re Spent Fuel Rack Analyses.List of Attendees Encl
ML16342B2881987-03-23023 March 1987
Summary of NRC 870304-05 Audit at Util Ofc in San Francisco, CA Re Pipeway Analyses & Calculations.List of Personnel Assisting in Audit & Info Provided by Util After Audit Encl
ML16341E1021987-03-10010 March 1987
Summary of 870218 Meeting W/Util & Franklin Research Ctr Re Spent Fuel Pool Expansion rack-to-rack Interactions & Licensee Response to NRC 870211 Request for Addl Listed Info.Attendance List Encl
ML17083B8631987-03-0505 March 1987
Summary of 861216 long-term Seismic Program Meeting W/Usgs Re Progress Made on Ground Motion Modelling Studies Undertaken by Util & Independent Study Undertaken by K Campbell on Behalf of NRC
ML17083B8601987-03-0303 March 1987
Summary of 870218 Meeting W/Util & Sierra Club in San Francisco,Ca Re multi-rack Impact Studies,High Density Spent Fuel Racks for Plant.List of Attendees Encl
1999-09-22
[Table view] |
Text
~$ flEgIj
~4
~o Cy ClO I
CO C
gO
++*++
UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 December 7, 1990 DOCKET NOS.:
50-275 and 50-323 LICENSEE:
FACILITY:
SUBJECT:
PACIFIC GAS AND ELECTRIC COMPANY (PGKE)
DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2
SUMMARY
OF NOVEMBER 27, 1990 PUBLIC MEETING ON SEISMIC DESIGN OF MASONRY WALLS AT DIABLO CANYON (TAC NUMBERS 74142 AND 74143)
On November 27, 1990 the NRC staff met with the Pacific Gas and Electric Company (PGKE or the licensee) in Rockville, Maryland to discuss the above subject.
Attendees at the meeting are given in Enclosure 1.
Slides presented by PGSE at the meeting are given in Enclosure 2.
The PGSE presentation summarized the results of (I) plant walkdowns conducted to reassess the number of safety-related masonry walls at Diablo Canyon, (2) calculations to determine the seismic capability of the masonry walls, and (3) an evaluation of methods of strengthening masonry walls at the top connection and at the midpoint.
PLANT WALKDOWNS The licensee stated that it had recently completed a
100% walkdown of the masonry walls in the facility.
This resulted in a reduction in the number of safety-related walls in the plant (both units) from 149 to 123.
Of the 123 safety-related walls, 63 are safety-related because safety equipment is attached to them.
The other 60 walls are safety-related because their collapse could potentially damage adjacent safety-related equipment.
Walls of this type are usually called "seismic interaction" walls or "Seismic Category 2/1" walls.
The licensee noted that the masonry walls at Diablo Canyon act as fire barriers and do not provide structural
- support, and thus their collapse would not affect the adequacy of the buildings containing them, the auxiliary building and the turbine building.
REANALYSIS OF THE TOP CONNECTION However, the staff stated at the meeting that it could not accept certain parts of the licensee's reanalysis assumptions and criteria.
Specifically, the staff stated that it can not accept the licensee's assumption that the unreinforced drypack concrete at the top of the walls could sustain about 50 psi of tensile
- stress, because of the absence of material test records and placement inspection records for the drypack.
The licensee agreed to re-examine the basis for this assumption, and to investigate ways of testing the top connection to determine its strength in shear and tension.
90i2i.3003i 90i207 PDR ADOCK 05000275 P
PDC QFo I I)I At the meeting, the licensee presented the results of reanalysis of the walls, using more conservative criteria and methods than had been used previously.
Two aspects of the seismic design of the walls were reanalyzed, the strength of the top connection between the walls and the ceiling, and the ability of the walls to withstand flexural loads.
The top connection analysis presented by the licensee showed that for 21 of the 123 safety-related walls, the shear loading will exceed the capacity.
f
REANALYSIS OF WALL FLEXURE The licensee reanalyzed the flexural capacity of the walls using the Uniform Bui lding Code (UBC) criteria.
The seismic loading on the walls (the demand) was based on the Diablo Canyon specific response spectra using the elastic natural frequency of the wall.
The reanalysis indicated that all of the walls had a capacity-to-demand ratio (C/D) of less than 1.
The licensee noted that the UBC would allow C/D ratios as low as I/6.
The staff stated at the meeting that it did not find the licensee's proposed C/D criteria acceptable.
The staff requested that the licensee develop and document the basis for allowing C/0 ratios less than 1.
METHODS OF STRENGTHENING THE WALLS The licensee described possible methods of strengthening the walls, both at the top connection and at the midpoint of the walls.
The method of strengthening "the top connection involved replacing the existing top clip angles with larger ones that would bear on the reinforced masonry portion of the wall rather than on the unreinforced drypack at the top of the wall.
Several methods of strengthening the middle section of the walls were presented, including the addition of vertical and horizontal steel columns adjacent to the walls, and the addition of steel plates on both sides of the walls.
Original Signed By:
Harry Rood, Senior Project Manager Project Directorate V
Division of Reactor Projects - III/IV/V DRSP/PD5 HRood 12/07/90 t'
/(A)D:PD5 Dyer 12/
/89
Enclosures:
1.
Meeting Attendees 2.
Licensee's Viewgraphs cc: w/enclosures - see next page DISTRIBUTION NRC 5 LPDR FMiraglia J Parti ow PDV Reading JDyer HRood OGC ACRS (10)
MVirgilio JRichardson JMa DJeng GBagchi YKim SBKim MS1 osson SRichards, Region V
- PNarbut, Region V
EJordan NChokshi BBoger WRussell
,1 vht t i
J I
VU V
1
~Vt V
I ~
UVV II"
~
IIH h,t V ',
V 1
ii Uv
~ 'I I
1 V
"Iht v
'I V
I
'I I"
I I
It
~ t j
~
IV U
h*
v lilt I
H 1
)
~
VII
" I) V ~
VIP,'v VIII VVI f VI tfv Vp
') '
V iv 'H tl.h VV 1
lt H,",
)
) thlh H $
I'I V
V 1
tt
Mr. J.
D. Shiffer Pacific Gas and Electric Company Diablo Canyon Cco NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 6715 Roc'anyon Creston, California 93432 Ms. Sandra A. Silver Mothers for Peace 660 Granite Creek Road Santa Cruz, California 95065 Ms. Jacquelyn C. Wheeler 3303 Barranca Court San Luis Obispo, California 93401 Managing Editor The Count Tele ram Tribune 1321 Jo nson Avenue P. 0.
Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Richard F. Locke, Esq.
Pacific Gas 8 Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. John Hickman Senior Health Physicist Environmental Radioactive Mgmt. Unit Environmental Management Branch State Department of Health Services 714 P Street, Room 616 Sacramento, California 95814 Regional Adminstrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. Peter H. Kaufman Deputy Attorney General State of California 110 West A Street, Suite 700 San Diego, California 92101 Ms.
Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 Michael M. Strumwasser, Esq.
Special Assistant Attorney General State of California Department of Justice 3580 Wilshire Boulevard, Room 800 Los Angeles, California 90010
ENCLOSURE 1
ATTENDEES Public Meeting on Diablo Canyon Masonry Walls
- Tuesday, November 27, 1990 NAME Goutam Bagchi Shan Bhattacharya Thomas M. Cheng James E. Dyer John B. Hoch David C. Jeng Sang Bo Kim Yong S.
Kim John S.
Ma David Ovadia Harry Rood Bimal Sarkar James E. Tomkins Wen S.
Tseng ORGANIZATION NRC/NRR/ESGB PGaE/NECS NRC/NRR/ESGB NRC/NRR/PDV PGSE/NSASRA NRC/NRR/ESGB NRC/NRR/ESGB NRC/NRR/ESGB NRC/NRR/ESGB PGKE NRC/NRR/PDV PGSE/Bechtel PGKE/NRA P GS E/ IC EC
ENCLOSURE 2 VIEWGRAPHS PRESENTED BY PG&E Public Meeting on Diablo Canyon Masonry Wall Seismic Design
- Tuesday, November 27, 1990
~
~
R E
0 FOLLOW-UP OF PREVIOUS NRC MEETINGS O
TWO ISSUES TOP CONNECTION FLEXURAL CRXTERXA 0
NRC REQUEST FOR ADDITIONAL STUDIES O
PGEE
RESPONSE
BLOCK 'LL ASSESSMENT PRO AM SAFETY - RELATED WALLS DECLASSIFICATION WALKDOWN CRITERIA HOSGRI REEVALUATION SESMIC YES CONNECT(
TOP QUALIFICATION RELYINGON REQ'D.
DRYPACK
?
2 FLEXURE CHECK YES STOP MEETS SRP 3.8.4 APX-A CRITERIA
'?
YES WALL YES STRUCTURALLY ACCEPTABLE STOP REBAR SCANNING AND DRYPACKTESTING ON SELECTEDWALLS REBAR EXTENDS INTO DRYPACK 2
TOP CONNECTION FIX FLEXURE FIX YES ADEQUATE DRYPACK STRENGTH
?
YES TOP CONN.
OK YES
SAFETY-RELATEO MA ONRY WALLS (U1+ U2)
TOTAL 149 1l AUX.
28 T.B.
121 WALL RECLASSIFICATION SR 28 25 NSR BEFORE WALKDOWN AFTER WALKDOWN SR 121 98 NSR 23 SR - EQP.
SR - SIP 24 1
SR - EQP.
SR - SIP 59 TOTALSR - EQP 63 TOTALSR - SIP
~ 60 BLOCKWALLRECLASSIFICATlON
( PRELIMINARY)
LHaEH9'R NSR SR-EQP SR - SIP Safety - Related Wall Non Safety-Related Wall Wall with Safety - Related items attached Wall in proximityof Safety - Related item Ffgure No. 1
It
R REQ ET:
REEVAULATE THE BLOCKWALLS USING ULTIMATE STRENGTH METHOD
- WHITNEY STRESS BLOCK
- REBAR AT YIELD
PG&E
RESPONSE
SUPPORTING REFERENCES 1.
DCPP FSAR Hosgri Re-evaluation 2.
UBC-88 3.
SRP Section 3.8.4, Appendix A 4.
Masonry Wall Test Program, San Onofre Nuclear Generating Station 5.
Drexel University Tests on Masonry Walls, (Sept., 1989) 6.
Out-of-Plane Dynamic Testing of Concrete Masonry Walls, Agbabian et.al., (July, 1989)
Y
KEY PARAMETERS (FOR STUDY)
~
Flexure Fy
= 51.4 ksi for Grade 40 Rebar 1
7%
Ref.
1 Wall Stiffness Flexural Capacity inelastic Energy Absorption Capabilities
- Ref. 2
- Whitney Stress Block
-Ref.4,58 6
~
Top Connection SRP Provisions Applied
r
'I~
"I
Ij T
P NNE Tt N
AUX.
T.B.
SR-EQP.
24 MEET SRP SR-SIP 1
NO RELIANCE ON T.C.
SR-EQP.
39 SR-SIP 59 T.C. RELIANCE NO RELIANCEON T.C.
32 27 11 21 MEETS DO NOT MEET SRP SRP RELYON T.C.
MEET SRP NO RELIANCE ON T.C.
19 LEGEND: TC = TOP CONNECTION Figure No. 2
RESULTS OF FLEXURE STUDY SR-EQP WALLS (63 walls)
~ Aux. 8/d S PAN Cto TYPE 1
(10 walls)
TYPE 2 (14 walls) 13'.79 0.92 1.3 Turbine 8/d TYPE 1
(17 walls)
[5 HELBI TYPE 2 (7 walls) 8'"
11-
17'
-0.6 0.56" 0.45 l
l I7 1.8" 2.2 TYPE 3 (15 walls) t6 HELBI 9'-1 1.5'.43-0.33 2.3-3.0
RESULTS OE FLEXURE STUDY SR-SIP WALLS (60 walls)
~ Aux. Bld SPAN C/D F
TYPE 1
(1 wall) 0.9
~ Turbine Bld.
TYPE 1 (23 walls) t7 HELB]
TYPE 2 (10 walls) f6 HELBI TYPE 3 (26 walls)~
l11 HELB]
8'"
13-
10.5-13'-0.'6 0.56-0.45 0.43" 0.24 1
1.7 1.8-2.2 2.3-4.1
~ 22 of the 26 walls are in the silencer area.
21 walls in the silencer area do not meet SRP for the top connection.
J ~
t F
V I
