ML16342D545
| ML16342D545 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 02/27/1997 |
| From: | Steven Bloom NRC (Affiliation Not Assigned) |
| To: | NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9703030349 | |
| Download: ML16342D545 (62) | |
Text
February 27, 1997 LICENSEE:
Pacific Gas and Electric Company FACILITY:
Diablo Canyon Nuclear Power Plant
SUBJECT:
SUMMARY
OF MEETI'NG HELD ON JANUARY 30, 1997 WITH PG&E TO DISCUSS THE PENETRATION SEAL
- PROGRAM, THE STATUS OF EMERGENCY LIGHTING, AND THE PROPOSED REMOVAL OF THE HALON SUPPRESSION SYSTEMS The NRC staff met with representatives of PG&E on January 30,
- 1997, in Rockvillh; Maryland to discuss (1) the status of the penetration seal
- program, (2) the status of emergency lighting, and (3) the proposed removal of the Halon suppression systems.
Attachment 1 contains the list of attendees at this meeting.
Attachment 2 contains the handouts used by the licensee for their presentations.
The first topic discussed was the penetration seal program.
The licensee will be revising LER 94-001, which will include a discussion on Ceilcote Epoxy Grout.
The next topic discussed
'was the status of emergency li.ghting.
The licensee has installed battery operated lighting in all areas requiring operator actions and access/egress pathways.
The last topic was a discussion on a proposal to remove the halon suppression system.
ORIGINAL SIGNED BY Steven D,
Bloom, Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV
. Office of Nuclear Reactor Regulation Docket Nos.
50-275 and 50-323 Attachments:
1.
List of Attendees 2.
Handout cc w/atts:
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UNtTED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 February 27, 1997 LICENSEE:
FACILITY:
SUBJECT:
Pacific Gas and Electric Company Diablo Canyon Nuclear Power Plant
SUMMARY
OF MEETING HELD ON JANUARY 30, 1997 WITH PG&E TO DISCUSS THE PENETRATION SEAL PROGRAM, THE STATUS OF EMERGENCY LIGHTING, AND THE PROPOSED REMOVAL OF THE HALON SUPPRESSION SYSTEMS The NRC staff met with representatives of PG&E on January 30, 1997, in Rockville, Maryland to discuss (1) the status of the penetration seal
- program, (2) the status of emergency lighting, and (3) the proposed removal of the Halon suppression systems.
Attachment 1 contains the list of attendees at this meeting.
Attachment 2 contains the handouts used by the licensee for their presentations.
The first topic discussed was the penetration seal program.
The licensee will be revising LER 94-001, which will include a discussion on Ceilcote Epoxy Grout.
The next topic discussed was the status of emergency lighting.
The licensee has installed battery operated lighting in all areas requiring operator actions and access/egress pathways.
The last topic was a discussion on a proposal to remove the halon suppression system.
Docket Nos.
50-275 and 50-323 Attachments:
1.
List of Attendees 2.
Handout cc w/atts:
See next page Seven D. Bloom, Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation
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cc w/atts:
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 1100 11th Street, Suite 311 Sacramento, California 95814 Ms. Nancy Culver San Luis Obispo Mothers for Peace P. 0.
Box 164 Pismo Beach; California 93448 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Room 4102 San Francisco, California 94102 Mr. Steve Hsu Radiologic Health Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94232 Diablo Canyon Independent Safety Committee ATTN:
Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D
Monterey, California 93940 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower 5 Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Christopher J. Warner, Esq.
Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Robert P.
Powers Vice President and Plant Manager Diablo Canyon Nuclear Power Plant P. 0.
Box 56 Avila Beach, California 93424 Telegram-Tribune ATTN:
Managing Editor 1321 Johnson Avenue P.O.
Box 112 San Luis Obispo, California 93406 P
Mr. Gregory M. Rueger Pacific Gas and Electric Company NPG - Mail Code AlOD P.O.
Box 770000 San Francisco, California 94177
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Attachment 1
MEETING WITH PACIFIC GAS AND ELECTRIC LICENSING ISSUES AND COMMITMENT TRACKING ATTENDEES Januar 30 1997 NRC S.
Bloom S.
West C.
Bajwa P. Quails PACIFIC GAS L ELECTRIC COMPANY T. Grebel R. Waltos D. Hampshire F.
De Peralta J.
Gregerson
0 P
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Pacific Gas and Electric Co.
Diablo Canyon Power Plant Fire Protection Program January 30, 1997
Fj're protection program Status
~ Penetration Seal Program
~ Emergency Lighting 10 CFR 50, Appendix R, Section III J
~ Halon Suppression System Removal
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Penetration Seal Program
~ Fin in s ccom lis ments to Date om letion Dates
~ Tar etecl
~ Historical Review
~ Imme iate orrective Actions
~ Pro ram Bases
1.
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Historical Review
~ LER 1-94-001-01, Silicone Foam Penetration Seals without Damming Material All ECG fire barriers declared inoperable Compensatory measures per ECGs implemented
~ Original Assumptions were Made:
Configuration Control Process was Effective (Lack of Damming Material was Outlier)
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fire protection requirements were encompassed in the design control process
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Historical Review Design Control Process was Effective
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All organizations coordinated through the fire protection group Work Control Process was Effective
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All organizations performing physical work coordinated through the fire protection group for changes affecting penetration seals.
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Construction was knowledgeable of the documentation requirements
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Historical Review Surveillance Procedure (M-70)
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100% every 18 months
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Detail Inspection Pen Seals effected by Other Design Criteria (HELB/MELB)were not impacted
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All "other" design basis were considered in the installation of penetration seals
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"other" design basis were adequately documented
~ Ceilcote Epoxy Grout Capabilities Suspect
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'E C
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Historical Review Dec 1996
~ Original Schedule was Based on Original Assumptions
~ Original Forecasted Completion-
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immediate Corrective Actions
~ Ownership established Fire Protection is lead organization for penetration seal program
~ Allwork on penetration seals temporarily halted interim measure while establishing control
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Immediate Corrective Actions Design and Work control procedures reviewed/revised Fire protection (FP) provides all seal designs All "pre-program" engineering guidance must be approved by engineering Any field change to engineering design must be approved by engineering.
QC inspection ensures engineering design is implemented in field
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program Basis
~ 100'io Inspection of App R and App A Barriers
~ Restore Barriers to Tested Configuration, or
~ Evaluate Acceptability of As-built Condition (Generic Letter 86-10 Evaluation)
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Findings
'ast Desigh Controls were Ineffective Other Engineering Disciplines not knowledgeable of penetration seals No coordination of changes affecting Penetration seals
~ Work Order Process Ineffective Penetration seals impacted without the appropriate coordination which engineering
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Findings
~ Numerous HELB/MELBSeals Impaired Same causes as those for fire penetration seals
~ Surveillance Procedure Ineffective in Identifying Impaired Seals Implementing procedure lacked the appropriate design requirements Inspectors lacked appropriate level of training
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Accomplishments to Date
~ Program Methodology Documented in FHARE 109
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CS and NCS (Standard and Low Combustible Details respectively)
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Credits the low combustible loading for the fire area
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Accomplishments to Date Calculation M-997
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Entire engineering design basis
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Industry standards (87-XX, 88-04, ASTM, IEEE, etc.)
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Licensing basis
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Test reviews
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. Methodogy for typical detail development
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Typical Pen Seal Details
Accomplishments to Date
~ Initial Walkdown of Fire Barriers Walkdown procedure Assumption Seal was installed correctly Non-destructive examination to collect raw data and noting specific superficial anomalies
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Accomplishments to Date
~ Fire Barrier Reduction (10CFR50 App R, Safe Shutdown vs. BTP 9.5-1 App A, Safety Related)
~ Commence Pen Seal Dispositions (July 1996) desk top instruction for dispositioning approximately 11,000 seals total ( includes internal conduit seals) approximately 6600 Appendix R seals approximately 3000 dispositions completed over the past 6 months
I T
enetration ea ro ram co e
App. R App. A (1)
Insurance (NML/UFC)
HELB/
App. A (2 Phase I
Appendix R-Appendix A Inspected (1)
Phase II HELB/MELB, Flood, HVAC, Radiation Insurance Phase III Appendix A Inspected (2)
1
Accomplishments to Date Approximately 80% of seals are acceptable as installed
~ Issue Contract for Repair of Penetration Seals
~ Ceilcote Tested by Omega Point Labs Preliminary review indicate a successful 3-hourtest
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Targeted Completion Dates
~ Appendix R Barriers Complete by End of '97 Majority of compensatory measures removed Inaccessible Unit 2 barriers to be completed by the end of 2R8
~ HELBiMELBand HVAC barriers complete by end of 1st Quarter '98
~ Appendix A Barriers Complete by end of 2nd Quarter '98
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~ PGB E Deviation Request (March 15, 1994 and May 25, 1994)
~ Method of Compliance with Section III.J
~ Calculation 335-DC
~ NRC Request for Additional Information (Dec. 12, 1996 Letter)
4 a
PG&E Deviation Request
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. 8-hour BOLs installed in AllAreas Requiring Operator Actions and Access/Egress Pathways
~ PG&E Requested use of Flashlights in certain
. Access/Egress Pathways
~ NRC Denied PG8 E's Deviation Request (May 5, 1995) 20
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Method of Compliance with Section III.J
~ 8-hour BOLs Installed in AllAreas. Needed for Operation of Safe Shutdown Equipment and AccesslEgress Routes Thereto
~ SSERs 23 and 31 - Approved Deviation for Use of Emergency AC and Emergency DC lights in Certain Areas
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Calculation 335-OC
~ Provides basis for PG8 E's compliance III.J
~ Lists Manual Operator Actions Requiring Emergency Lighting
~ Identifies Emergency Lighting Credited for Section III.J 8-hour BOLs and Emergency AClDC Lights
~ Identifies Location of Operator Actions
~ Identifies Access/Egress Pathways
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NRC Letter Dated Dec. 12, f998
~ Describe Actions Taken after Denial of Deviation
~ Confirm Installation of 8-hour Emergency Lights
~ PGB E's Position:
PGB E meetsSection III.J Requirements except for use of Emergency AC and DC Lights which were. approved in SSERs 23 and 31.
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Haion Suppression System Removal
~ Back round
~ License ommitments
~ Basis for Removin Halon stem
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Halon Suppression System Removal
~ Installed in SSPS Rooms (Fire Areas 8-6 and 8-H)
~ Committed Modification during Appendix A of BTP (AP.CSB) 9.5-1 Review
~ Commitment Documented in SSERs 8 and 9
~ NRC Inspection Report 89-17 Prior NRC Approval Obtained If System Replaced 25
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Halon Suppression System Removal
~ Current License Condition Changes can be made to approved program without NRC approval provided the ability to achieve and maintain safe shutdown conditions is not adversely affected
~ Evaluated Acceptability of Removing System
~ Completed 10 CFR 50.59 Safety Evaluation 26
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