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{{#Wiki_filter:March 6, 2006 | {{#Wiki_filter:March 6, 2006 | ||
Virginia Electric and Power Company | Virginia Electric and Power Company | ||
ATTN: Mr. David A. Christian | ATTN: | ||
Mr. David A. Christian | |||
Senior Vice President and | |||
Chief Nuclear Officer | |||
Innsbrook Technical Center | Innsbrook Technical Center | ||
5000 Dominion Boulevard | 5000 Dominion Boulevard | ||
Glen Allen, VA 23060 | Glen Allen, VA 23060 | ||
SUBJECT: | SUBJECT: | ||
NOTIFICATION OF TRIENNIAL FIRE PROTECTION BASELINE INSPECTION | |||
(NRC INSPECTION REPORT 05000280/2006009 AND 05000281/2006009) | |||
Dear Mr. Christian: | Dear Mr. Christian: | ||
The purpose of this letter is to notify you that the U.S. Nuclear Regulatory Commission (NRC) | The purpose of this letter is to notify you that the U.S. Nuclear Regulatory Commission (NRC) | ||
Region II staff will conduct a triennial fire protection baseline inspection at the Surry Power | Region II staff will conduct a triennial fire protection baseline inspection at the Surry Power | ||
Station, Units 1 and 2, in June 2006. The inspection team will be led by Mr. McKenzie Thomas, | Station, Units 1 and 2, in June 2006. The inspection team will be led by Mr. McKenzie Thomas, | ||
NRC Senior Reactor Inspector, of the Region II Office. The team will be composed of | NRC Senior Reactor Inspector, of the Region II Office. The team will be composed of | ||
personnel from the NRC Region II Office and a contractor. The inspection will be conducted in | personnel from the NRC Region II Office and a contractor. The inspection will be conducted in | ||
accordance with the NRCs baseline fire protection inspection procedure 71111.05T. | accordance with the NRCs baseline fire protection inspection procedure 71111.05T. | ||
The inspection objective will be to evaluate your fire protection program implementation with | The inspection objective will be to evaluate your fire protection program implementation with | ||
emphasis on post-fire safe shutdown capability and the fire protection features provided to | emphasis on post-fire safe shutdown capability and the fire protection features provided to | ||
ensure at least one post-fire safe shutdown success path is maintained free of fire damage. | ensure at least one post-fire safe shutdown success path is maintained free of fire damage. | ||
The inspection team will focus their review on the separation of the systems and equipment | The inspection team will focus their review on the separation of the systems and equipment | ||
necessary to achieve and maintain safe shutdown and the fire protection features of selected | necessary to achieve and maintain safe shutdown and the fire protection features of selected | ||
| Line 42: | Line 44: | ||
On March 2, 2006, during a telephone conversation between Mr. Barry Garber, Surry Licensing | On March 2, 2006, during a telephone conversation between Mr. Barry Garber, Surry Licensing | ||
Supervisor, and Mr. Thomas, our respective staffs confirmed arrangements for a three-day | Supervisor, and Mr. Thomas, our respective staffs confirmed arrangements for a three-day | ||
information gathering onsite visit and a two-week onsite inspection. The schedule for the | information gathering onsite visit and a two-week onsite inspection. The schedule for the | ||
inspection is as follows: | inspection is as follows: | ||
* | |||
Information gathering visit: | |||
May 16-18, 2006 | |||
* | |||
Week 1 of onsite inspection: June 12-16, 2006 | |||
* | |||
Week 2 of onsite inspection: June 26-30, 2006 | |||
The purposes of the information gathering visit are to obtain information and documentation | The purposes of the information gathering visit are to obtain information and documentation | ||
needed to support the inspection, and to become familiar with the Surry Power Station fire | needed to support the inspection, and to become familiar with the Surry Power Station fire | ||
protection program, fire protection features, post-fire safe shutdown capabilities and plant | protection program, fire protection features, post-fire safe shutdown capabilities and plant | ||
layout. The types of documents the team will be interested in reviewing, and possibly obtaining, | layout. The types of documents the team will be interested in reviewing, and possibly obtaining, | ||
are listed in the Enclosure. | are listed in the Enclosure. | ||
VEPCO | VEPCO | ||
Please contact Mr. Thomas prior to preparing copies of the materials listed in the Enclosure. | 2 | ||
Please contact Mr. Thomas prior to preparing copies of the materials listed in the Enclosure. | |||
The inspection team will try to minimize your administrative burden by specifically identifying | The inspection team will try to minimize your administrative burden by specifically identifying | ||
those documents required for inspection preparation. | those documents required for inspection preparation. | ||
During the information gathering visit, the team will also discuss the following inspection support | During the information gathering visit, the team will also discuss the following inspection support | ||
administrative details - office space; specific documents to be made available to the team in its | administrative details - office space; specific documents to be made available to the team in its | ||
office space; arrangements for reactor site access (including radiation protection training, | office space; arrangements for reactor site access (including radiation protection training, | ||
security, safety and fitness for duty requirements); and the availability of knowledgeable plant | security, safety and fitness for duty requirements); and the availability of knowledgeable plant | ||
engineering and licensing organization personnel to serve as points of contact during the | engineering and licensing organization personnel to serve as points of contact during the | ||
| Line 66: | Line 73: | ||
documentation regarding the implementation and maintenance of the Surry Power Station fire | documentation regarding the implementation and maintenance of the Surry Power Station fire | ||
protection program, including post-fire safe shutdown capability, be readily accessible to the | protection program, including post-fire safe shutdown capability, be readily accessible to the | ||
team for its review. Of specific interest are those documents which establish that your fire | team for its review. Of specific interest are those documents which establish that your fire | ||
protection program satisfies NRC regulatory requirements and conforms to applicable NRC and | protection program satisfies NRC regulatory requirements and conforms to applicable NRC and | ||
industry fire protection guidance. Also, personnel should be available at the site during the | industry fire protection guidance. Also, personnel should be available at the site during the | ||
inspection who are knowledgeable regarding those plant systems required to achieve and | inspection who are knowledgeable regarding those plant systems required to achieve and | ||
maintain safe shutdown conditions from inside and outside the control room (including the | maintain safe shutdown conditions from inside and outside the control room (including the | ||
| Line 74: | Line 81: | ||
systems and features, and the Surry Power Station fire protection program and its | systems and features, and the Surry Power Station fire protection program and its | ||
implementation. | implementation. | ||
Your cooperation and support during this inspection will be appreciated. If you have questions | Your cooperation and support during this inspection will be appreciated. If you have questions | ||
concerning this inspection, or the inspection team's information or logistical needs, please | concerning this inspection, or the inspection team's information or logistical needs, please | ||
contact Mr. Thomas at (404) 562-4673, or me at (404) 562-4669. | contact Mr. Thomas at (404) 562-4673, or me at (404) 562-4669. | ||
| Line 80: | Line 87: | ||
enclosure will be available electronically for public inspection in the NRC Public Document | enclosure will be available electronically for public inspection in the NRC Public Document | ||
Room or from the Publicly Available Records (PARS) component of NRCs document system | Room or from the Publicly Available Records (PARS) component of NRCs document system | ||
(ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading- | (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading- | ||
rm/adams.html (the Public Electronic Reading Room). | rm/adams.html (the Public Electronic Reading Room). | ||
Sincerely, | |||
\\\\RA\\\\ | |||
D. Charles Payne, Chief | |||
Engineering Branch 2 | |||
Division of Reactor Safety | |||
Docket Nos.: 50-280, 50-281 | Docket Nos.: 50-280, 50-281 | ||
License Nos.: DPR-32, DPR-37 | License Nos.: DPR-32, DPR-37 | ||
Enclosure: Triennial Fire Protection Inspection Support Documentation | Enclosure: Triennial Fire Protection Inspection Support Documentation | ||
cc w/encl: (See page 3) | cc w/encl: (See page 3) | ||
VEPCO | VEPCO | ||
3 | |||
cc w/encl: | cc w/encl: | ||
Chris L. Funderburk, Director | Chris L. Funderburk, Director | ||
Nuclear Licensing and | Nuclear Licensing and | ||
Operations Support | |||
Virginia Electric & Power Company | Virginia Electric & Power Company | ||
Electronic Mail Distribution | Electronic Mail Distribution | ||
| Line 107: | Line 115: | ||
Division of Energy Regulation | Division of Energy Regulation | ||
P. O. Box 1197 | P. O. Box 1197 | ||
Richmond, VA 23209 | Richmond, VA 23209 | ||
Lillian M. Cuoco, Esq. | Lillian M. Cuoco, Esq. | ||
Senior Counsel | Senior Counsel | ||
| Line 115: | Line 123: | ||
Supreme Court Building | Supreme Court Building | ||
900 East Main Street | 900 East Main Street | ||
Richmond, VA 23219 | Richmond, VA 23219 | ||
_________________________ | _________________________ | ||
OFFICE | |||
RII:DRS | |||
RII:DRS | |||
RII:DRP | |||
RII:DRS | |||
SIGNATURE | |||
MXT2 | |||
PJF | |||
KDL | |||
DCP | |||
NAME | |||
M. Thomas | |||
P. Fillion | |||
K. Landis | |||
C. Payne | |||
DATE | |||
3/3/2006 | |||
3/3/2006 | |||
3/6/2006 | |||
3/6/2006 | |||
3/ /2006 | |||
3/ /2006 | |||
3/ /2006 | |||
E-MAIL COPY? | |||
YES | |||
NO YES | |||
NO YES | |||
NO YES | |||
NO YES | |||
NO YES | |||
NO YES | |||
NO | |||
Enclosure | |||
Triennial Fire Protection Inspection Support Documentation | |||
Note: This is a broad list of the documents the NRC inspection team may be interested | |||
in reviewing, and possibly obtaining, during the information gathering site visit. The | |||
current version of these documents is expected unless specified otherwise. Electronic | |||
media is preferred, if readily available. (The preferred file format is searchable .pdf | |||
files on CDROM. The CDROM should be indexed and hyperlinked to facilitate ease of | |||
use. Please provide 5 copies of each CDROM submitted.) Information in lists should | |||
contain enough information to be easily understood by someone who has a knowledge | |||
of the technology. The lead inspector will discuss specific information needs with the | |||
licensee staff and may request additional documents. | |||
1. | |||
The Fire Protection Program document and the Fire Hazards Analysis. | |||
2. | |||
The fire protection program implementing procedures (e.g., administrative controls, | |||
surveillance testing, fire brigade). | |||
3. | |||
The fire brigade training program document and the pre-fire plans for the selected fire | |||
areas/zones (to be determined during information gathering visit). | |||
4. | |||
The post-fire safe shutdown analysis, including system and separation analyses. | |||
5. | |||
The alternative shutdown analysis. | |||
6. | |||
Piping and instrumentation (flow) diagrams for the fire suppression systems. | |||
7. | |||
Piping and instrumentation (flow) diagrams for the systems and components used to | |||
achieve and maintain hot standby, and cold shutdown, for fires involving shutdown from | |||
the control room. | |||
8. | |||
Piping and instrumentation (flow) diagrams for the systems and components used to | |||
achieve and maintain hot standby, and cold shutdown, for fires in areas requiring | |||
alternative or dedicated shutdown capability. | |||
9. | |||
Plant layout and equipment drawings which identify the physical plant locations of hot | |||
standby and cold shutdown equipment. | |||
10. | |||
Plant layout drawings which identify plant fire area and/or fire zone delineation, areas | |||
protected by automatic fire suppression and detection, and the locations of fire | |||
protection equipment for the selected fire areas/zones (to be determined during | |||
information gathering visit). | |||
11. | |||
Plant layout drawings which identify the general location of the post-fire emergency | |||
lighting units. | |||
12. | |||
Plant operating procedures used to, and describing, shutdown from inside the control | |||
room with a postulated fire occurring in any plant area outside the control room. | |||
2 | |||
24. A list of plant fire protection licensing basis documents (i.e., a list of the SERs and | Enclosure | ||
13. | |||
Plant operating procedures used to implement the alternative shutdown capability from | |||
25. A list of fire protection or Appendix R calculations. | outside the control room with a fire in either the control or cable spreading room (or any | ||
26. A list of fire impairments identified during the previous year. | other alternative shutdown area). | ||
27. A list of abbreviations/designators for plant systems. | 14. | ||
Maintenance and surveillance testing procedures for alternative shutdown capability | |||
(including Appendix R emergency lights and communication systems) and fire barriers, | |||
detectors, fire pumps and fire suppression systems. | |||
15. | |||
Calculations and/or justifications that verify fuse/breaker coordination for the selected | |||
fire areas/zones (to be determined during information gathering visit) that are fed off the | |||
same electrical buses as components in the protected train. Also, a list of the | |||
maintenance procedures used to routinely verify fuse/breaker coordination in | |||
accordance with the post-fire safe shutdown coordination analysis. | |||
16. | |||
A list of the significant fire protection and post-fire safe shutdown design change | |||
descriptions (including their associated 10 CFR 50.59 evaluations) and Generic Letter | |||
(GL) 86-10 evaluations. | |||
17. | |||
A list of the protection methodologies (as identified in 10 CFR Part 50, Appendix R, | |||
Section III.G) used to achieve regulatory compliance for the selected fire areas/zones | |||
(to be determined during information gathering visit). That is, please specify whether 3- | |||
hour rated fire barriers (Section III.G.2.a), 20-foot separation along with detection and | |||
suppression (Section III.G.2.b), 1-hour rated fire barriers with detection and suppression | |||
(Section III.G.2.c), or alternative shutdown capability (Section III.G.3) is used for the | |||
selected fire areas/zones. | |||
18. | |||
Procedures or instructions that govern the implementation of plant modifications, | |||
temporary modifications, maintenance, and special operations, and their impact on fire | |||
protection. | |||
19. | |||
Organization chart(s) of site personnel down to the level of the fire protection staff. | |||
20. | |||
Procedures or instructions that control the configuration of the fire protection program, | |||
features, and post-fire safe shutdown methodology and system design. | |||
21. | |||
A list of applicable codes and standards related to the design of plant fire protection | |||
features and evaluations of code deviations (i.e., a listing of the NFPA code editions | |||
committed to (Code of Record)). | |||
22. | |||
The three most recent fire protection QA audits and/or fire protection self-assessments. | |||
23. | |||
A list of open and closed fire protection problem identification and resolution reports | |||
[also known as action reports/condition reports/problem reports/problem investigation | |||
reports/NCRs/EARs] associated with fire protection or Appendix R safe shutdown for the | |||
past three years. | |||
3 | |||
Enclosure | |||
End Enclosure | |||
24. | |||
A list of plant fire protection licensing basis documents (i.e., a list of the SERs and | |||
change evaluations which form the licensing basis for the facilitys post-fire safe | |||
shutdown configuration). | |||
25. | |||
A list of fire protection or Appendix R calculations. | |||
26. | |||
A list of fire impairments identified during the previous year. | |||
27. | |||
A list of abbreviations/designators for plant systems. | |||
}} | }} | ||
Latest revision as of 11:08, 15 January 2025
| ML060660023 | |
| Person / Time | |
|---|---|
| Site: | Surry |
| Issue date: | 03/06/2006 |
| From: | Payne D NRC/RGN-II/DRS/EB2 |
| To: | Christian D Virginia Electric & Power Co (VEPCO) |
| References | |
| IR-06-009 | |
| Download: ML060660023 (7) | |
See also: IR 05000280/2006009
Text
March 6, 2006
Virginia Electric and Power Company
ATTN:
Mr. David A. Christian
Senior Vice President and
Chief Nuclear Officer
Innsbrook Technical Center
5000 Dominion Boulevard
Glen Allen, VA 23060
SUBJECT:
NOTIFICATION OF TRIENNIAL FIRE PROTECTION BASELINE INSPECTION
(NRC INSPECTION REPORT 05000280/2006009 AND 05000281/2006009)
Dear Mr. Christian:
The purpose of this letter is to notify you that the U.S. Nuclear Regulatory Commission (NRC)
Region II staff will conduct a triennial fire protection baseline inspection at the Surry Power
Station, Units 1 and 2, in June 2006. The inspection team will be led by Mr. McKenzie Thomas,
NRC Senior Reactor Inspector, of the Region II Office. The team will be composed of
personnel from the NRC Region II Office and a contractor. The inspection will be conducted in
accordance with the NRCs baseline fire protection inspection procedure 71111.05T.
The inspection objective will be to evaluate your fire protection program implementation with
emphasis on post-fire safe shutdown capability and the fire protection features provided to
ensure at least one post-fire safe shutdown success path is maintained free of fire damage.
The inspection team will focus their review on the separation of the systems and equipment
necessary to achieve and maintain safe shutdown and the fire protection features of selected
fire areas.
On March 2, 2006, during a telephone conversation between Mr. Barry Garber, Surry Licensing
Supervisor, and Mr. Thomas, our respective staffs confirmed arrangements for a three-day
information gathering onsite visit and a two-week onsite inspection. The schedule for the
inspection is as follows:
Information gathering visit:
May 16-18, 2006
Week 1 of onsite inspection: June 12-16, 2006
Week 2 of onsite inspection: June 26-30, 2006
The purposes of the information gathering visit are to obtain information and documentation
needed to support the inspection, and to become familiar with the Surry Power Station fire
protection program, fire protection features, post-fire safe shutdown capabilities and plant
layout. The types of documents the team will be interested in reviewing, and possibly obtaining,
are listed in the Enclosure.
2
Please contact Mr. Thomas prior to preparing copies of the materials listed in the Enclosure.
The inspection team will try to minimize your administrative burden by specifically identifying
those documents required for inspection preparation.
During the information gathering visit, the team will also discuss the following inspection support
administrative details - office space; specific documents to be made available to the team in its
office space; arrangements for reactor site access (including radiation protection training,
security, safety and fitness for duty requirements); and the availability of knowledgeable plant
engineering and licensing organization personnel to serve as points of contact during the
inspection.
We request that during the inspection weeks you ensure that copies of analyses, evaluations or
documentation regarding the implementation and maintenance of the Surry Power Station fire
protection program, including post-fire safe shutdown capability, be readily accessible to the
team for its review. Of specific interest are those documents which establish that your fire
protection program satisfies NRC regulatory requirements and conforms to applicable NRC and
industry fire protection guidance. Also, personnel should be available at the site during the
inspection who are knowledgeable regarding those plant systems required to achieve and
maintain safe shutdown conditions from inside and outside the control room (including the
electrical aspects of the relevant post-fire safe shutdown analyses), reactor plant fire protection
systems and features, and the Surry Power Station fire protection program and its
implementation.
Your cooperation and support during this inspection will be appreciated. If you have questions
concerning this inspection, or the inspection team's information or logistical needs, please
contact Mr. Thomas at (404) 562-4673, or me at (404) 562-4669.
In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter and its
enclosure will be available electronically for public inspection in the NRC Public Document
Room or from the Publicly Available Records (PARS) component of NRCs document system
(ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-
rm/adams.html (the Public Electronic Reading Room).
Sincerely,
\\\\RA\\\\
D. Charles Payne, Chief
Engineering Branch 2
Division of Reactor Safety
Docket Nos.: 50-280, 50-281
Enclosure: Triennial Fire Protection Inspection Support Documentation
cc w/encl: (See page 3)
3
cc w/encl:
Chris L. Funderburk, Director
Nuclear Licensing and
Operations Support
Virginia Electric & Power Company
Electronic Mail Distribution
Donald E. Jernigan
Site Vice President
Surry Power Station
Virginia Electric & Power Company
Electronic Mail Distribution
Virginia State Corporation Commission
Division of Energy Regulation
P. O. Box 1197
Richmond, VA 23209
Lillian M. Cuoco, Esq.
Senior Counsel
Dominion Resources Services, Inc.
Electronic Mail Distribution
Attorney General
Supreme Court Building
900 East Main Street
Richmond, VA 23219
_________________________
OFFICE
RII:DRS
RII:DRS
RII:DRP
RII:DRS
SIGNATURE
MXT2
PJF
KDL
NAME
M. Thomas
P. Fillion
K. Landis
C. Payne
DATE
3/3/2006
3/3/2006
3/6/2006
3/6/2006
3/ /2006
3/ /2006
3/ /2006
E-MAIL COPY?
YES
NO YES
NO YES
NO YES
NO YES
NO YES
NO YES
NO
Enclosure
Triennial Fire Protection Inspection Support Documentation
Note: This is a broad list of the documents the NRC inspection team may be interested
in reviewing, and possibly obtaining, during the information gathering site visit. The
current version of these documents is expected unless specified otherwise. Electronic
media is preferred, if readily available. (The preferred file format is searchable .pdf
files on CDROM. The CDROM should be indexed and hyperlinked to facilitate ease of
use. Please provide 5 copies of each CDROM submitted.) Information in lists should
contain enough information to be easily understood by someone who has a knowledge
of the technology. The lead inspector will discuss specific information needs with the
licensee staff and may request additional documents.
1.
The Fire Protection Program document and the Fire Hazards Analysis.
2.
The fire protection program implementing procedures (e.g., administrative controls,
surveillance testing, fire brigade).
3.
The fire brigade training program document and the pre-fire plans for the selected fire
areas/zones (to be determined during information gathering visit).
4.
The post-fire safe shutdown analysis, including system and separation analyses.
5.
The alternative shutdown analysis.
6.
Piping and instrumentation (flow) diagrams for the fire suppression systems.
7.
Piping and instrumentation (flow) diagrams for the systems and components used to
achieve and maintain hot standby, and cold shutdown, for fires involving shutdown from
the control room.
8.
Piping and instrumentation (flow) diagrams for the systems and components used to
achieve and maintain hot standby, and cold shutdown, for fires in areas requiring
alternative or dedicated shutdown capability.
9.
Plant layout and equipment drawings which identify the physical plant locations of hot
standby and cold shutdown equipment.
10.
Plant layout drawings which identify plant fire area and/or fire zone delineation, areas
protected by automatic fire suppression and detection, and the locations of fire
protection equipment for the selected fire areas/zones (to be determined during
information gathering visit).
11.
Plant layout drawings which identify the general location of the post-fire emergency
lighting units.
12.
Plant operating procedures used to, and describing, shutdown from inside the control
room with a postulated fire occurring in any plant area outside the control room.
2
Enclosure
13.
Plant operating procedures used to implement the alternative shutdown capability from
outside the control room with a fire in either the control or cable spreading room (or any
other alternative shutdown area).
14.
Maintenance and surveillance testing procedures for alternative shutdown capability
(including Appendix R emergency lights and communication systems) and fire barriers,
detectors, fire pumps and fire suppression systems.
15.
Calculations and/or justifications that verify fuse/breaker coordination for the selected
fire areas/zones (to be determined during information gathering visit) that are fed off the
same electrical buses as components in the protected train. Also, a list of the
maintenance procedures used to routinely verify fuse/breaker coordination in
accordance with the post-fire safe shutdown coordination analysis.
16.
A list of the significant fire protection and post-fire safe shutdown design change
descriptions (including their associated 10 CFR 50.59 evaluations) and Generic Letter (GL) 86-10 evaluations.
17.
A list of the protection methodologies (as identified in 10 CFR Part 50, Appendix R,
Section III.G) used to achieve regulatory compliance for the selected fire areas/zones
(to be determined during information gathering visit). That is, please specify whether 3-
hour rated fire barriers (Section III.G.2.a), 20-foot separation along with detection and
suppression (Section III.G.2.b), 1-hour rated fire barriers with detection and suppression
(Section III.G.2.c), or alternative shutdown capability (Section III.G.3) is used for the
selected fire areas/zones.
18.
Procedures or instructions that govern the implementation of plant modifications,
temporary modifications, maintenance, and special operations, and their impact on fire
protection.
19.
Organization chart(s) of site personnel down to the level of the fire protection staff.
20.
Procedures or instructions that control the configuration of the fire protection program,
features, and post-fire safe shutdown methodology and system design.
21.
A list of applicable codes and standards related to the design of plant fire protection
features and evaluations of code deviations (i.e., a listing of the NFPA code editions
committed to (Code of Record)).
22.
The three most recent fire protection QA audits and/or fire protection self-assessments.
23.
A list of open and closed fire protection problem identification and resolution reports
[also known as action reports/condition reports/problem reports/problem investigation
reports/NCRs/EARs] associated with fire protection or Appendix R safe shutdown for the
past three years.
3
Enclosure
End Enclosure
24.
A list of plant fire protection licensing basis documents (i.e., a list of the SERs and
change evaluations which form the licensing basis for the facilitys post-fire safe
shutdown configuration).
25.
A list of fire protection or Appendix R calculations.
26.
A list of fire impairments identified during the previous year.
27.
A list of abbreviations/designators for plant systems.