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Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.3 Seismic Unit 2, Part 1 of 3
	ML12333A270
Person / Time
Site:	Diablo Canyon
Issue date:	11/27/2012
From:	Halpin E D; Pacific Gas & Electric Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
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ML123330375	List: DCL-12-119, Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.3 Seismic Unit 2, Part 2 of 3; ML12333A269; ML12333A270;
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	Download: ML12333A270 (142)
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Pacific Gas and Electric Company November 27,2012 PG&E Letter DCL-12-119 u.s. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852 Docket No. 50-323, OL-DPR-82 Diablo Canyon Power Plant Unit 2 Edward D. Halpin Senior Vice President Nuclear Generation

& Chief Nuclear Officer Diablo Canyon Power Plant Mail Code 104/6 P. O. Box 56 Avila Beach, CA 93424 805.545.4100 E*Mail: E1H8@pge.com 10 CFR 50.54(f) Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation

2.3 Seismic

Unit 2

References:

1. NRC Letter, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident," dated March 12, 2012 2. NRC Letter, "Endorsement of Electric Power Research Institute (EPRI) Draft Report 1025286, 'Seismic Walkdown Guidance,'" dated May 31,2012 3. PG&E Letter DCL-12-065, "Pacific Gas and Electric Company's 120-Day Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-Ichi Accident," dated July 10, 2012 Dear Commissioners and Staff: On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued Reference 1 to Pacific Gas and Electric Company (PG&E). Enclosure 3 of Reference 1 contains the requested information and required responses associated with Recommendation 2.3 Seismic. In Reference 1, the NRC requested that each addressee confirm that it will use the industry-developed NRC-endorsed seismic walkdown procedures.

Reference 2 documents the NRC's endorsement of EPRI 1025286. In Reference 3, PG&E confirmed that it would use EPRI 1025286, as endorsed by Reference 2, as the basis for the seismic walkdowns at the Diablo Canyon Power Plant (DCPP).

m Document Control Desk November 27, 2012 I & Page 2 PG&E Letter DCL-12-119 Enclosure 3 of Reference 1 states that within 180 days of the NRC's endorsement of the walkdown process, each addressee will submit its final response for the requested information.

Enclosure 3 of Reference 1 also stated that the response should include a list of any areas that are unable to be inspected due to inaccessibility and a for when the walkdown will be completed.

Enclosure 1 of this letter provides PG&E's response to Recommendation

2.3 Seismic

for DCPP Unit 2 accessible components.

PG&E will submit an updated response after inspection of currently inaccessible items. PG&E is making regulatory commitments (as defined by NEI 99-04) in Enclosure 2 of this letter. This letter includes no revisions to existing regulatory commitments.

If you have any questions, or require additional information, please contact Mr. Terence L. Grebel at (805) 545-4160.

I declare under penalty of perjury that the foregoing is true and correct. Executed on November 27,2012. Sincerely, Edward D. Halpin Senior Vice President

-Chief Nuclear Officer dmfn/SAPN 50465913 Enclosures cc: Diablo Distribution cc/enc: Elmo E. Collins, NRC Region IV Eric J. Leeds, NRC Director, Office of Nuclear Reactor Regulation Laura H. Micewski, Acting NRC Senior Resident Inspector Joseph M. Sebrosky, NRR Project Manager A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

Comanche Peak

Diablo Canyon

Palo Verde

San Onofre

South Texas Project

Wolf Creek Response to Recommendation

2.3 Seismic

Diablo Canyon Power Plant Unit 2 Enclosure 1 PG&E DCL-12-119 Page 1 of 15 Acronyms used in this response are defined in Attachment L to this enclosure.

==

Introduction:==

On March 12, 2012, the NRC issued letter, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident" (Reference 1). Enclosure 3 of Reference 1 contains a request for information related to the results of the seismic design basis walkdowns performed in accordance with NRC Letter, "Endorsement of Electric Power Research Institute (EPRI) Draft Report 1025286, 'Seismic Walkdown Guidance,'" dated May 31,2012, (Reference 2). Purpose: Reference 1 requests that within 180 days of NRC's endorsement of the walkdown procedure, each addressee will submit its final response for the requested information and that the response should include a list of any areas that are unable to be inspected due to inaccessibility and a schedule for when the walkdowns will be completed.

This Enclosure contains PG&E's response for the requested information for Unit 2, which includes the results of the walkdowns performed and any further actions required.

This response also includes a list of any components that PG&E was unable to inspect due to inaccessibility and a schedule for when PG&E will complete those walkdowns.

NRC Request: a. Describe the plant-specific hazard licensing bases and a description of the protection and mitigation features considered in the licensing basis evaluation PG&E Response:

The seismic inputs applicable to the design of DCPP are described in the DCPP UFSAR, Sections 2.5 and 3.7. Since the development of the seismic inputs for DCPP predates the issuance of 10 CFR 100, Appendix A, "Seismic and Geologic Siting Criteria for Nuclear Power Plants," the following DCPP-specific earthquakes are defined: Design Earthquake The design earthquake (0.2g) is defined as the maximum size earthquake that can be expected to occur at DCPP during the life of the reactor. The design earthquake is the equivalent of the operating basis earthquake, as described in 10 CFR 100, Appendix A.

Double Design Earthquake Enclosure 1 PG&E DCL-12-119 Page 2 of 15 The double design earthquake (0.4g) is defined as the hypothetical earthquake that would produce accelerations twice those of the design earthquake.

The double design earthquake is the equivalent of the safe shutdown earthquake, as described in 10 CFR 100, Appendix A. Hosgri Earthquake The Hosgri earthquake (0.75g) is defined as the predicted ground motion at DCPP due to a Richter magnitude

7.5 earthquake

on the offshore Hosgri fault. The Hosgri earthquake does not correspond to an operating basis earthquake or safe shutdown earthquake.

Long Term Seismic Program In addition to the above three earthquakes, PG&E implemented a program to reevaluate DCPP's seismic design, as described below. As part of the operating license issuance for DCPP Unit 1, the NRC imposed a license condition that required in part: "PG&E shall develop and implement a program to reevaluate the seismic design bases used for the DCPP." PG&E's reevaluation effort in response to the license condition was titled the "Long Term Seismic Program." In June 1991, the NRC issued SSER 34, in which the NRC concluded that PG&E had satisfied the license condition described above. In SSER 34, the NRC requested certain confirmatory analyses from PG&E, and PG&E subsequently submitted the requested analyses.

The NRC's final acceptance of the L TSP is documented in a letter to PG&E dated April 17, 1992. Although the L TSP contains extensive databases and analyses that update the basic geologic and seismic information in the UFSAR, the L TSP material does not alter the design bases for DCPP. In SSER 34, the NRC states: "The Staff notes that the seismic qualification basis for Diablo Canyon will continue to be the original design basis plus the Hosgri evaluation basis, along with associated analytical methods, initial conditions, etc." Classification of SSCs The classification system applicable to SSCs at DCPP is described in the UFSAR, Section 3.2. Since the development of the classification system for DCPP predates Regulatory Guide 1.29, "Seismic Design Classification," DCPP does not use SC I terminology.

Instead, DCPP uses the following classifications:

Design Class I: SSCs necessary to ensure: (a) the integrity of the reactor coolant pressure boundary, (b) the capability to shut down the reactor and maintain it in a safe Enclosure 1 PG&E DCL-12-119 Page 3 of 15 shutdown condition, or (c) the capability to prevent or mitigate the consequences of accidents that could result in potential offsite exposures comparable to the guideline exposures of 10 CFR 100 are classified as Design Class I. Design Class I SSCs are designed for the design earthquake, double design earthquake, and Hosgri earthquake.

Design Class I SSCs correspond to SC I SSCs, as defined in Regulatory Guide 1.29. Design Class II: SSCs important to reactor operation but not essential to safe shutdown and isolation of the reactor, and failure of which would not result in the release of substantial amounts of radioactivity, are classified as Design Class II. In general, Design Class II SSCs correspond to non-SC I SSCs, as defined in Regulatory Guide 1.29. Some Design Class II SSCs are required for the operation of certain Design Class I features and are designed for the double design earthquake or the Hosgri earthquake.

Therefore, as discussed above, all Design Class I and selected Design Class II components that are designed for the double design earthquake or the Hosgri earthquake are scoped in as equivalent to SC I for the purpose of this evaluation.

Codes, Standards, and Methodology Given the above considerations regarding Design Class I and II equipment, some of the major codes and standards used include: (1) ANSI 831.1, "Power Piping" (1967 Edition up to and including 1973 Addenda) (2) ANSI 831.7, "Nuclear Power Piping" (1969 Edition with 1970 Addenda) (3) ACI-318-63, "8uilding Code Requirements for Reinforced Concrete" (4) AISC, Specification for the Design, Fabrication, and Erection of Structural Steel for 8uildings (1969) (5) IEEE 344-1971, "IEEE Recommended Practices for Seismic Qualification of Class I Electric Equipment for Nuclear Power Generating Stations." Specific cases have been supplemented by seismic qualification criteria per IEEE 344-1975.

Additional codes and standards are identified in the UFSAR. NRC-approved methodologies were used for design, construction, and any modification of seismic-related SSCs at DCPP Unit 2. The various methodologies used for the SSCs are identified in the UFSAR.

NRC Request: Enclosure 1 PG&E DCL-12-119 Page 4 of 15 b. Present information related to the implementation of the walkdown process, PG&E Response:

Personnel Qualifications:

The development of the various teams of personnel for the DCPP seismic walkdown effort was consistent with EPRI 1025286, Section 2. The equipment selection personnel were responsible for identifying the sample of SSCs to be walked down in accordance with the guidance of EPRI 1025286, Section 4. The equipment selection personnel were selected based on their knowledge of the following areas: (1) plant operations (2) . plant documentation (3) associated SSCs (4) the IPEEE program The SWEs were responsible for the required walkdown inspections per the approved plant procedures and/or practices.

The SWEs were required to have the following qualifications:

(1) a degree in mechanical or civil/structural engineering or equivalent (2) experience in seismic engineering as it applies to nuclear power plants (3) successful completion of either the NTTF 2.3 seismic walkdown training course or the SQUG walkdown training course The licensing basis reviewers were responsible for the performance of evaluations of potentially adverse seismic conditions identified during the walkdowns against the licensing basis for the SSCs. They were selected based on having knowledge and experience in the following areas: (1) the seismic licensing bases of DCPP (2) seismic qualification methods and documentation used at DCPP (3) the DCPP requirements and procedures for entering documentation into the plant records system and the CAP The peer review personnel were responsible for collectively reviewing the following:

(1) the SWEL for scope (2) a sample of completed SWCs and AWCs to validate the process and to identify and communicate any lessons learned for the remaining walkdown efforts Enclosure 1 PG&E DCL-12-119 Page 5 of 15 (3) LBEs and the decisions on entering potentially adverse seismic conditions into CAP (4) this response being submitted to the NRC to determine that the objectives and requirements of the NRC and the endorsed EPRI guidance were met The peer reviewers included members of the teams above and other plant personnel that have expertise in related plant processes.

Attachment A to this enclosure provides a summary of the qualifications of each of the team members and a table of activities that they performed.

SWEL Development The process for selecting the DCPP SSCs for the SWEL included appropriate variety of classes of equipment, environments, primary and secondary systems, new and replacement equipment, and other elements consistent with EPRI 1025286, Section 3. The DCPP SWELs were developed for the following two groups of SSCs: (1) a sample of SSCs required to safely shutdown the reactor and maintain containment integrity (SWEL-1) (2) a sample of SSCs required to support SFP-related processes including components that could potentially allow rapid drain-down of the SFP in the event of an earthquake (SWEL-2) Development of SWEL-1 The development of the SWEL-1 followed a process defined in EPRI 1025286 through the application of the following four screens: (1) Screen No.1 -Seismic Category I (2) Screen No.2 -Equipment or System (3) Screen NO.3 -Support for Five Safety Functions (4) Screen NO.4 -Sample Considerations Screen No. 1 -Seismic Category I Screen No.1 narrowed the scope of SSCs included in SWEL-1 from the total population of SSCs to those that are classified as SC I, where SC I is defined in Regulatory Guide 1.29. However, as discussed in the UFSAR Section 3.2.1, the licensing basis for the seismic classification system for DCPP does not include Regulatory Guide 1.29, so SSCs are not explicitly classified as SC I. However, as discussed in the UFSAR Section 3.2.1, the licensing basis for the seismic classification system for SSCs meets the intent of Safety Guide 29, which uses the term "Category I" for "all structures, Enclosure 1 PG&E DCL-12-119 Page 6 of 15 systems, and components important to safety" that must remain functional in the event of a safe shutdown earthquake.

The application of Screen No. 1 was based on the equivalency between DCPP's classification system and SC I as discussed previously in this enclosure.

Design Class I SSCs and those Design Class II SSCs that have been seismically qualified for double design earthquake or Hosgri earthquake screened-in under Screen NO.1. Screen No.2 -Equipment or Systems Screen No.2 narrowed the scope of SSCs in SWEL-1 by selecting only those SSCs that do not regularly undergo inspections to confirm that their configuration continues to be consistent with the DCPP licensing basis. The following types of SSCs screened-out of SWEL-1 under Screen No.2: (1) SCI -equivalent structures (2) containment penetrations (SWEL-1 includes certain CIVs) (3) SC I -equivalent piping systems Screen NO.3 -Support for the Five Safety Functions Screen NO.3 narrowed the scope of SSCs in the SWEL-1 to those that are associated with maintaining the following five safety functions:

(1) reactor reactivity control (2) reactor coolant pressure control (3) reactor coolant inventory control (4) decay heat removal (5) containment function Screen NO.3 was applied in two steps: (1) application to the output of Screen No.2 and (2) application to the "previous equipment list." These steps are described in the following subsections.

(1) Application to the Output of Screen No.2 The application of Screen NO.3 to the output from Screen No.2 was completed and the list of SSCs that screen-in through the application of Screen NO.3 served as input to Screen NO.4. (2) Application to the Previous Equipment List In accordance with EPRI 1025286, Section 3, DCPP used "previous equipment lists" as part of the application of Screen NO.3. DCPP used a combination of all SSCs from the following previous equipment lists that are SC I-equivalent.

Enclosure 1 PG&E DCL-12-119 Page 7 of 15 (a) DCPP IPEEE, completed in 1994, and documented in the "Individual Plant Examination for External Events Report for Diablo Canyon Power Plant Units 1 and 2 in Response to Generic Letter 88-20 Supplement 4." (b) UFSAR, Appendix 9.5G, "Equipment Required for Safe Shutdown," includes a tabulation of the minimum equipment required to bring the plant to a cold shutdown condition.

Screen NO.4 -Sample Considerations Screen NO.4 modifies the scope of the SWEL-1 from that selected in Screen NO.3 to sufficiently represent a broad population of SC I-equivalent SSCs in order to meet the overall objective of the seismic walkdowns.

The following five sample selection attributes were applied under Screen NO.4: (1) a variety of types of systems (2) major new and replacement equipment (3) a variety of types of equipment (4) a variety of environments (5) equipment enhancements associated with the IPEEE program (note that no vulnerabilities were identified during the implementation of the IPEEE program for DCPP) Finalization of the SWEL-1 The SWEL-1 was finalized to include representative item(s) from each of the above five attributes.

In addition, the risk significance of specific SSCs was considered in the final selection process. See Attachment C of this enclosure for the final SWEL-1 list. Development of SWEL-2 The development of the DCPP SWEL-2 followed a process defined by EPRI 1025286 through the application of the following four screens: (1) Screen No. 1 -Seismic Category I (2) Screen No.2 -Equipment or System (3) Screen NO.3 -Sample Considerations (4) Screen No.4 -Rapid Drain-Down Screen No. 1 -Seismic Category I Screen No. 1 narrowed the scope of SFP-related SSCs included in the SWEL-2 from the total population of SFP-related SSCs at DCPP to those that are classified as SC I, where SC I is defined in Regulatory Guide 1.29. Since Regulatory Guide 1.29 is not Enclosure 1 PG&E DCL-12-119 Page 8 of 15 directly applicable to DCPP, the screening was based on equivalency between DCPP's classification system and SC I. Screen No.2 -Equipment or Systems Screen No.2 narrowed the scope of SSCs in the DCPP SWEL-2 by selecting only those that do not regularly undergo inspections to confirm that their configuration continues to be consistent with the DCPP licensing basis. The following types of SSCs were screened-out of the SWEL-2 under Screen No.2: (1) SC I -equivalent structures (2) SC I -equivalent piping systems Screen NO.3 -Sample Considerations Screen NO.3 modified the scope of the SWEL-2 from that selected in Screen No.2 to sufficiently represent a broad population of SC I-equivalent SSCs in order to meet the overall objective of the seismic walkdowns.

The following sample selection attributes were applied under Screen NO.3: (1) a variety of types of systems (2) major new and replacement equipment (3) a variety of types of equipment (4) a variety of environments Screen NO.4 -Rapid Drain-down Screen NO.4 identified items that could allow the SFP to drain rapidly. The scope of these items was typically limited to hydraulic lines connected to the SFP and the equipment connected to those lines. All piping entering the SFP was added to the SWEL-2 to verify that siphoning of water from the SFP was not possible.

SFP Penetrations EPRI 1025286 requires for Screen No.4 that penetrations below about 10 feet above the top of the fuel assemblies be evaluated for rapid drain-down.

At DCPP there are no such penetrations.

SFP Configurations Associated with Refueling Outages Drain-down flow paths that could exist as a result of the various SFP configurations associated with refueling outages at DCPP were investigated.

SSCs associated with these flow paths were added to the SWEL-2.

Finalization of the SWEL-2 Enclosure 1 PG&E DCL-12-119 Page 9 of 15 The SWEL-2 was finalized to include representative item(s) having each of the attributes associated with Screen NO.3 and all items associated with potential rapid drain-down.

The Unit 2 components that were excluded from the SWEL-2 are listed in Table 1 below: T bl 1 U 't 2 C a e nI t E Iddf omponen s xcu e rom th SWEL 2 L' f e -IS Ing Component Basis for Exclusion Refueling water purification pump Not required for SFP inventory control or cooling. Refueling water purification filter Not required for SFP inventory control or cooling. SFP demineralizers and resin traps Not required for SFP inventory control or cooling, inaccessible due to high radiation levels. Spent fuel storage racks Racks are free-standing (no anchorage to SFP), are passive (no moving parts), and are not classified as targets in the SISIP. Cask pit platform Used for anchorage of spent fuel transfer cask during cask loading operations.

No functional relationship to SFP cooling or inventory control. New fuel storage rack Not located in SFP. SFP bridge crane No functional relationship to SFP inventory control or cooling. New fuel elevator No functional relationship to SFP inventory control or cooling. 480-V electric power Provides power to the SFPCS pumps, but components from this system have already been included in the SWEL-1. 120-V electric power Provides power for SFP-related instrumentation, but components from this system have already been included in the SWEL-1. SFP cooling system pressure instrumentation No functional relationship to SFP inventory control or cooling. FHBVS fire dampers Associated with fires, not seismic events. FHBVS fan air monitors Not required for operation of FHBVS. FHBVS emergency exhaust section Post-accident mitigation components; not required for normal operation of FHBVS. FHBVS normal roughing and HEPA filters Post-accident mitigation components; not required for normal operation of FHBVS. Combination of the SWEL-1 and the SWEL-2 Based on the guidance in EPRI 1025286, Figure 1-3, "Seismic Walkdowns, Area Bys, and Licensing Evaluations," the final DCPP SWEL is the combination of SWEL-1 and SWEL-2.

Requested Summary Lists Enclosure 1 PG&E DCL-12-119 Page 10 of 15 (1) Attachment B to this enclosure provides the Unit 2 SWEL-1 Base List 1, which is the equipment coming out of Screen NO.3 and entering Screen NO.4 of the SWEL-1. (2) Attachment C to this enclosure provides the Unit 2 SWEL-1 list, which is the equipment coming out of Screen NO.4 selected for seismic walkdown.

(3) Attachment D to this enclosure provides the Unit 2 SWEL-2 Base List 2 of the equipment coming out of Screen No.2 and entering Screen NO.3 SWEL-2. (4) Attachment E to this enclosure provides the Unit 2 SWEL-2 Rapid Drain-Down list of equipment coming out of Screen NO.4 determined to potentially cause SFP to rapidly drain-down.

(5) Attachment F to this enclosure provides the Unit 2 SWEL-2 list, which is a combination of the equipment coming out of Screens NO.3 and NO.4. The system diversity of these lists is shown below in Table 2 and the equipment class diversity is shown in Table 3: Table 2: Unit 2 Diablo Canyon Power Plant System Diversity Listing (SWEL-1) System No. System Description Selected Equipment Count 03 Feedwater 6 04 Turbine Steam Supply 9 08 Chemical and Volume Control 7 09 Safety Injection 5 10 Residual Heat Removal 5 14 Component Cooling Water 6 17 SaltWater 2 21 Diesel Engine Generator 21 23 Ventilation and Air Conditioning 20 25 Compressed Air 1 36 Eagle 21 2 38 Solid State Protection 4 41 Reactor Control Rods 1 43 Plant Annunciators 1 63 4.16-kV Electrical 3 64 480-V Electrical 3 65 120-V Instrument AC 3 67 125-V and 250-Vdc 4 96 Multiple System Panels 9 Total 112 Enclosure 1 PG&E DCL-12-119 Page 11 of 15 Table 3: Unit 2 Diablo Canyon Power Plant Equipment Class Diversity Listing (SWEL-1) Class Class Title Selected Equipment Count 0 Miscellaneous 11 1 Motor Control Centers 1 2 Low Voltage Switchgear 3 3 Medium Voltage Switchgear 1 4 Transformers 3 5 Horizontal Pumps 6 6 Vertical Pumps 2 7 Fluid Operated Valves 16 8 Motor Operated Valves, Solenoid Operated Valves 14 9 Fans 4 10 Air Handlers 5 11 Chillers 0 1 12 Air Compressors 1 13 Motor Generators 0 2 14 Distribution Panels 3 15 Batteries on Racks 1 16 Battery Chargers and Inverters 2 17 Engine Generators 2 18 Instruments on Racks 4 19 Temperature Sensors 2 20 Instrumentation and Control Panels and Racks 23 21 Tanks and Heat Exchangers 8 Total 112 Notes: 1. DCPP does not have any chillers, since there is not a chilled-water system. Seismically-qualified air conditioning systems at DCPP use Freon-based cooling coils, condensers, and compressors.

2. The only motor generators at DCPP are those for the control rod drive system, which are not seismically qualified (excluded at Screen No.1), so they cannot be included in the seismic walkdowns.

Summary of Walkdown Process Enclosure 1 PG&E DCl-12-119 Page 12 of 15 An SWC or an AWC package was prepared for each item on the SWEL. The actual walkdowns and walk-bys were performed by a minimum of two qualified SWEs. Each walkdown or walk-by package contains, as a minimum, the following:

(1) SWC or AWC, as appropriate (2) relevant drawings (components, locations, etc.) (3) location (unit, area, etc.) (4) relevant anchorage details (for components subject to configuration verification)

(5) relevant technical information Each component walkdown and area walk-by was completed by a team of at least two qualified SWEs. Any potentially adverse seismic conditions identified by the team were noted in the SWCs and AWCs. For each of the potentially adverse seismic-related conditions and observations, a lBE was performed to determine the component's ability to perform its required function.

If this evaluation resulted in no potentially adverse seismic conditions, no further action was necessary and the results were documented in the walkdown checklists.

For seismic conditions or observations that were determined to be adverse, the condition or observation was documented in the walkdown checklist and entered into the CAP. Other non-seismic related items identified during the team walkdowns were documented on the checklists and entered into the CAP. The lBEs were performed by DCPP cognizant engineers and subject to a peer review. Potentially adverse seismic conditions that could not readily be resolved were entered into the CAP. The peer review team consisted of a minimum of two individuals and any comments were addressed.

NRC Request: c. Present a list of plant-specific vulnerabilities (including any seismic anomalies, outliers, or other findings) identified by the IPEEE and a description of the actions taken to eliminate or reduce them (including their completion dates) PG&E Response:

As provided in PG&E letter DCl 94-133, "Response to Generic letter 88-20 Supplement 4, 'Individual Plant Examination of External Events for Severe Accident Vulnerabilities," dated June 27, 1994, (Reference 3), based on the results presented in the IPEEE study, no vulnerabilities with regard to seismic induced core damage exist at DCPP. There were other completed plant improvements that have a beneficial impact on the PRA that were included in the SWEl development.

NRC Request: Enclosure 1 PG&E DCL-12-119 Page 13 of 15 d. Results of the walkdown including key findings and identified degraded, conforming, or unanalyzed conditions.

Include a detailed description of the actions taken or planned to address these conditions using the guidance in Regulatory Issues Summary 2005-20, Rev 1, Revision to NRC Inspection Manual Part 9900 Technical Guidance, "Operating Conditions Adverse to Quality or Safety," including entering the condition in the corrective action program. PG&E Response:

The completed walkdowns (SWEL-1 and SWEL-2 combined) for Unit 2 was comprised of 106 SWCs and 54 AWCs. Sixteen potentially adverse seismic conditions were identified, placed in CAP and evaluated.

The engineering evaluations were completed and the conditions did not adversely affect the performance of any required safety function.

In one instance a component was conservatively declared inoperabfe (due to anchorage degradation) and it was repaired and returned to service; subsequent evaluation showed that the component would have performed its seismic safety function.

The CAP status of these items is identified in Attachment G of this enclosure.

Attachment H of this enclosure provides a listing of components that were inaccessible in accordance with EPRI 1025286 and could not be inspected prior to submittal of this response.

These inaccessible items will be inspected prior to the end of the next refueling outage for Unit 2 (2R17). 2R17 is currently scheduled to be completed in March 2013. An update from those inspections will be submitted within 60 days following the completion of 2R17. Attachment I of this enclosure contains the SWCs including any associated LBEs. Attachment J of this enclosure contains AWCs including any associated LBEs. In summary, there were no deficiencies entered into CAP for Unit 2 that resulted in any safety related SSCs being inoperable or non-functional.

NRC Request: e. Discuss any planned or newly installed protection and mitigation features PG&E Response:

There are currently no planned or newly-installed changes to the plant as a result of implementing this seismic walkdown guidance.

NRC Request: Enclosure 1 PG&E DCl-12-119 Page 14 of 15 f. Results and any subsequent actions taken in response to the peer review PG&E Response:

Various members of the peer review team reviewed the entire process of the DCPP seismic walkdown guidance as well as each element. Peer reviewers did not review their own work. The peer review process included reviewing the following:

(1) the selection of the SSCs in the SWEl (2) a sample of the SWCs and the AWCs (3) the lBEs and decisions for entering the potentially adverse conditions into CAP (4) the submittal response Attachment K of this enclosure provides a table that corresponds to each of these activities and includes the results of the reviews and any actions taken to address those results.

References:

1. NRC letter dated March 12, 2012, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3 of the Near Term Task Force Review of Insights from the Fukushima ichi Accident" 2. NRC letter, "Endorsement of Electric Power Research Institute (EPRI) Draft Report 1025286, 'Seismic Walkdown Guidance,'" dated May 31,2012 3. PG&E letter DCl 94-133, dated June 27, 1994, Response to Generic letter 88-20. Supplement 4, "Individual Plant Examination of External Events for Severe Accident Vulnerabilities" Attachment A B C D E F G H I L K L Attachment List Title Enclosure 1 PG&E DCL-12-119 Page 15 of 15 Seismic Walkdown Equipment List Team Personnel Qualifications Unit 2: Seismic Walkdown Equipment List-1 Base List 1 Unit 2: Seismic Walkdown Equipment List-1 Unit 2: Seismic Walkdown Equipment List-2 Base List 2 Unit 2: Seismic Walkdown Equipment List-2 Rapid Drain-Down List Unit 2: Seismic Walkdown Equipment List-2 Unit 2: Potentially Adverse Seismic Conditions Entered into the Corrective Action Program Unit 2: Inaccessible Component List Unit 2: Seismic Walkdown Checklists Unit 2: Area Walk-By Checklists Unit 2: Summary Findings of the Peer Reviews List of Acronyms Attachment A Enclosure1 PG&E DCL-12-119 Attachment A Page 1 of 3 Seismic Walkdown Equipment List Team Personnel Qualifications The following contains a brief summary of the industry and educational qualification of the personnel that were directly involved with the equipment selection, seismic walkdowns, licensing basis reviews, individual plant examination of external events reviews, and peer reviews. Team Members Nozar Jahangir, PE is DCPP's manager of project engineering and the seismic project team lead. Mr. Jahangir is a degreed civil engineer and has over 30 years in the nuclear power industry at DCPP involved in plant seismic design and qualifications.

William Horstman, PE is a DCPP senior civil engineer on the Fukushima response project. Mr. Horstman is a degreed civil engineer specializing in structural engineering.

Mr. Horstman has 32 years of experience in the commercial nuclear power industry, including over 22 years at DCPP, where he has provided services in civil engineering, seismic design, seismic analysis, license amendments, design criteria development, and licensing basis impact evaluations.

David Miklush is a degreed mechanical engineer with 34 years of experience in the nuclear industry at DCPP. Mr. Miklush was licensed as an operator for both units at DCPP for 7 years. Mr. Miklush has also served as operations director, maintenance director, and engineering director.

Patrick Huang, PE is a degreed civil engineer and has over 30 years of experience in the nuclear industry.

Mr. Huang has worked for DCPP performing seismic equipment qualification for 23 years. Matthew Sage is a degreed mechanical engineer and provided engineering support for this project. Scott Maze, PE is a degreed civil engineer and has over 23 years of structural engineering experience including experience in seismic design, most of that in support of DCPP. David Cryer is a degreed mechanical engineer, and has over 34 years in the nuclear power industry.

Most of Mr. Cryer's work has been for DCPP in seismic qualification of equipment and pipe support.

Enclosure1 PG&E DCL-12-119 Attachment A Page 2 of 3 Thomas Kipp is a degreed aeronautical engineer and has 42 years of experience in the nuclear power industry in fields including PRA, fragility analysis, and the L TSP at DCPP. Kevin Moore is a degreed structural engineer with over a year of experience in the nuclear power industry, including work at several nuclear generating stations.

Mr. Moore also participated in seismic walkdowns for San Onofre Nuclear Generating Station. Fred Grant is a degreed engineer specializing in mechanics of structures and has 7 years of experience in mechanical and structural engineering.

Four of Mr. Grant's years in the industry have been dedicated to seismic walkdowns and seismic fragility analysis.

Krishna Amirineni, PE is a degreed civil engineer and with 4 years of seismic structural engineering experience in the nuclear power industry.

David Nakaki, Ph.D, PE is a degreed engineer with 25 years in the nuclear power industry.

Mr. Nakaki has been involved with DCPP L TSP program in developing equipment fragility evaluations since the 1980s. Nathan Barber is a degreed nuclear engineer with 10 years of experience in PRA at DCPP. Murrell Evans provided operations support for this project. Mr. Evans has 36 years of experience in the nuclear industry, over 31 of which have been in support of DCPP, including holding positions as an operations shift manager and maintenance operation support manager. Philippe Soenen is a degreed mechanical engineer and has 10 years of licensing experience in the nuclear industry, most of that in support of DCPP. Mr. Soenen is a licensing supervisor.

Thomas Baldwin, PE is a degreed mechanical engineer with 26 years of experience with DCPP, holding positions such as a design engineer, senior reactor operator; engineering supervisor, procedure services manager, and licensing manager.

Personnel SWE Training Personnel Functions and Qualifications Ops I Licensing EPRI I SWE ESP Ops Systems IPEEE Basis Individuals SQUG Reviewer Nozar Jahangir EPRI x x . William Horstman EPRI x x x Scott Maze EPRI x x David Cryer EPRI x x David Miklush N/A x x X Murrell Evans N/A x David Nakaki SQUG x Thomas Kipp SQUG x Kevin Moore Both x Fred Grant EPRI x Krishna Amirineni EPRI x x Nathan Barber N/A x Matthew Sage N/A Patrick Huang N/A x Philippe Soenen N/A Thomas Baldwin N/A System Engineers N/A x Note: There are four peer review activities listed below. The numbers correspond to the review performed

1. Peer review of the selection of the SSCs in the SWEL 2. Peer review of a sample of the SWCs and the AWCs 3. Peer review of the LBEs and the decisions for entering the potentially adverse conditions into CAP 4. Review of the submittal report PEER Reviewer (see note) 1,2,3 2,3 3 3 4 1 1,2,3 1 3 4 4 Enclosure1 PG&E DCL-12-119 Attachment A Page 3 of 3 Support Personnel x x x Component Volume control tank outlet to CCP suction valves (LCV-1128, LCV-112C)

Emergency borate valve to charging pump flow path (8104) Valves in flow path to RCS through regenerative Hx (8107,8108,8145,8146, 8147,8148)

Charging pump discharge FCV-128 RCP seal water relief valve (RV-8121)

RWST to charging pump suction valves (8805A,88058)

RWST to Sl pump suction valves (8976) RHR discharge to charging pump suction valves (8804A, 88048) Charging pump injection valves (8801A, 88018, 8803A, 88038) '-----Attachment B Unit 2: Seismic Walkdown Equipment List-1 Base List 1 EPRI 1025286 Screen NO.3 ( Five SF or CF) RRC RCPC RCIC DHR CF IPEEE SSEL (YIN) (YIN) (YIN) (YIN) (YIN) (YIN) (YIN) Y Y Y N Y Y Y Y Y Y N Y N Y Y Y Y N Y N Y Y Y Y N Y N Y Y Y Y N Y N Y N N N N Y Y Y N N N N Y Y N N N N N Y Y N N N N N Y Y Y ------Enclosure1 PG&E DCL-12-119 Attachment B Page 1 of 5 Remarks Flow path pressure boundary and CIVs Added from SSEL. Added from SSEL. Added from SSEL. Added from SSEL. Valves in the recirculation between RHR Sl and CCP are not safe shutdown equipment; only valves that are CIVs are included.

Valves in the recirculation between RHR Sl and CCP are not safe shutdown equipment; only valves that are CIVs are included.

EPRI 1025286 Screen NO.3 ( Five SF or CF) RRC RCPC RCIC DHR CF Component (YIN) (YIN) (YIN) (YIN) (YIN)

Containment recirculation suction valves N N N N Y (8982A, 89828) Accumulator outlet valves to cold leg valve N N N N Y CCW pumps N N Y Y Y CCW Hxs N N Y Y Y CCW surge tank N N Y Y Y CCW header A and 8 FCVs N N N N Y (FCV-430, FCV-431) SG blowdown isolation valves (FCV-151, N N N N Y 157,160,244,246,248,250,760,761,762, 763) CCW pump auxiliary lube oil pumps N N Y Y Y (CCWAP1, CCWAP2, CCWAP3) DG fuel off shutoff valves (LCV-85 to LCV-90) Y Y Y Y Y Emergency DG, including engines Y Y Y Y Y DG main lead terminallbox Y Y Y Y Y DG air start receiver Y Y Y Y Y DG inlet air filter Y Y Y Y Y DG inlet silencer Y Y Y Y Y DG exhaust silencer Y Y Y Y Y DFODT Y Y Y Y Y DG radiatorlwater pump Y Y Y Y Y 4160-V switchgear (8us F, G, H) Y Y Y Y Y ASW pump overcurrent relays Y Y Y Y Y ASW pump undervoltage relays Y Y Y Y Y IPEEE SSEL (YIN) (YIN) Y N N Y Y Y Y Y Y Y Y Y N Y N Y Y Y Y Y Y N Y N Y N Y N Y N Y N Y N Y Y Y Y Y Y Enclosure1 PG&E DCL-12-119 Attachment B Page 2 of 5 Remarks Valves in the recirculation between RHR SI and CCP are not safe shutdown equipment; only valves that are CIVs are included.

Added from SSEL. Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment CIVs only Added from SSEL. Added from SSEL. Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Component CCW pump undervoltage relay CCW pump overcurrent relays 4160-V load center transformer overcurrent relays (51 HF1 0 to 51 HH1 0) CCP overcurrent relays AFW motor driven pump overcurrent relays Startup transformer overcurrent relays (Bus F, G, H) ASW pump control transfer switch relay CCW pump control transfer switch relays 4160-V potential transformers (Bus F, G, H) DG shutdown relays DG overcurrent Relays DG oil pressure timer relays DG overcrank timer relays DG oil pressure relays DG jacket water temperature trip relays DG engine start relays DG overcrank relays DG excitation cu bicle DG control panel Safeguard relay panel (Bus F, G, H) 480-V breaker cabinets (load centers) (SPF to SPH) CCW FCV Motor Control Contactors EPRI 1025286 Screen No.3 ( Five SF or CF) RRC RCPC RCIC DHR CF (YIN) (YIN) (YIN) (YIN) (YIN) Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y IPEEE (YIN) Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y SSEL (YIN) Y Y Y Y N N Y Y N N N N N N N N N N N N Y Y Enclosure1 PG&E DCL-12-119 Attachment B Page 3 of 5 Remarks Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Component CCW FCV control switches (FCV-430 , FCV-431) 480-V auxiliary relay panel 4160-V/480-V transformers (THF10 to THH10) Instrument breaker panels (PY21 to PY26) 120-V inverters (IY21 to IY24) 125-Vdc batteries (BAT21 to BAT23) Battery racks Battery chargers (BTC21, BTC22, BTC221, BTC231, BTC232) 125-V and 250-Vdc switchgearlbreaker panels (S021 to S023) Nuclear auxiliary relay rack SSPS Auxiliary safeguards cabinet Process control and protection system Process control and protection instrument racks (P1A to P1 C) Main control boards (2VB1 to 2VB5) and control console (1 to 3) Hot shutdown panel Containment fan coolers Containment purge valves (RCV-11, RCV-12, FCV-660, FCV-661) Auxiliary building supply fans (S-37, S-38) EPRI 1025286 Screen No.3 ( Five SF or CF) RRC RCPC RCIC OHR CF (YIN) (YIN) (YIN) (YIN) (YIN)

Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N Y Y Y Y N Y Y Y N Y Y N Y N Y Y N Y Y Y Y Y Y Y Y Y Y Y N N N N Y N N N N Y N Y Y Y Y IPEEE SSEL (YIN) (YIN)

N Y Y N Y N Y N Y Y Y Y Y Y Y Y Y Y Y Y N Y N Y N Y N Y N Y N Y N Y N Y N Enclosure1 PG&E DCL-12-119 Attachment B Page 4 of 5 Remarks Added from SSEL. Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment EPRI 1025286 Screen No.3 ( Five SF or CF) RRC RCPC RCIC OHR CF Component (YIN) (YIN) (YIN) (YIN) (YIN) 480-V switchgear room supply fans N Y Y Y Y (S-45, S-46) Auxiliary building exhaust fans (E-45, E-46) N Y Y Y Y Auxiliary building shutoff (discharge) dampers N Y Y Y Y (FCV-5045, FCV-5046)

Auxiliary building backdraft dampers N Y Y Y Y (BOO-45, BOO-46) ASW pump control switch relays Y Y Y Y Y ASW pump control switch relays at hot Y Y Y Y Y shutdown panel CCW pump control switch relays Y Y Y Y Y CCW pump control switch relays at hot Y Y Y Y Y shutdown panel Auxiliary transformer overcurrent relays Y Y Y Y Y (Bus F, G, H) IPEEE SSEL (YIN) (YIN) Y N Y N Y N Y N Y N Y N Y N Y N Y N Enclosure1 PG&E DCL-12-119 Attachment B Page 5 of 5 Remarks Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment Safe shutdown equipment

System Equipment New or Component No. Class Environment Replacement RRC (YIN) AFW lead 1 temperature element 3 19 MIE N N TO AFW pump 1 3 5 MIE N N AFW pump 2 (Motor-Driven) 3 5 MIE N N TO AFW pump discharge to SG 3 7 OE N N LCV-110 AFW pump discharge to SG 3 7 MIE N N LCV-115 TO AFW pump discharge to SG 3 8 OE N N LCV-106 Isolation valve FCV-95 control switch contactor (supply to TO 4 1 MIE N N AFW pump) Stop valve FCV-152 on supply to 4 0 MIE N N TO AFW pump 1 MS FCV-41 4 7 OE N N MS PORV No. PCV-20 4 7 OE N N (10% Dump) Isolation valves on supply to TO 4 8 MIE N N AFW pump (FCV-37) MSSV RV-13 4 7 MIE N N MSSV RV-3 4 7 OE N N MSSV RV-61 4 7 MIE N N MSSV RV-8 4 7 OE N N Boric acid storage tank No. 1 level transmitter No. LT-102 8 18 MIE N Y Seal water Hx 8 21 MIE N Y CCP 1 (emergency) 8 5 MIE N Y CCP 3 (normal) 8 5 MIE Y Y Attachment C Unit 2: Seismic Walkdown Equipment List-1 Safety Function Risk RCPC RCIC DHR CF Significance SSEL (YIN) (YIN) N N N N N N N N Y N Y Y N N Y N Y Y N N N Y N N N N N Y N N N N N Y N N N N Y N N N N N Y N N Y N N Y N N Y N N Y N N Y N N Y N N Y N N Y N N N N N Y N N N N N Y N N N N N Y N N N N Y N N N Y Y Y N N N N Y Y N N Y Y Y Y N N N Y IPEEE IPEEE Enhancement i Y/N) (YIN) N N Y N Y N Y N Y N Y N N N N N Y N Y N N N Y N Y N Y N Y N N N N N Y N Y N Walkdown Package No. DC-2-03-I-E-TE-117 DC-2-03-M-P P-AFWP 1 DC-2 M-P P-AFWP2 DC-2-03-P-VOH-FW-2-LCV-110 DC-2-03-P-VOH-FW-2-LCV-115 DC-2-03-P-VOM-FW-2-LCV-106 DC-2-04-LD30 DC-2-04-P-V-\VIS-2-FCV-152 DC-2-04-P-VOA-MS-2-FCV-41 DC-2-04-P-VOA-MS-2-PCV-20 DC-2-04-P-VOM-MS-2-FCV-37 DC-2-04-P-VR-MS-2-RV-13 DC-2-04-P-VR-MS-2-RV-3 DC-2-04-P-VR-MS-2-RV-61 DC-2-04-P-VR-MS-2-RV-8 DC-2-08-\-T-L T-1 02 DC-2-08-M-HX-SWH E 1 DC-2-08-M-PP-CCP1 DC-2-08-M-PP-CCP3 Enclosure1 PG&E DCL-12-119 Attachment C Page 1 of 7 Remarks Added for variety of types of systems and variety of equipment types (19). Added based on peer review. Added based on peer review. Added from SSEL. Special type of control valve for steam turbine. Added from SSEL. Added from SSEL and variety of systems. Mounted in local panel No. XLT102. Added based on recommendation from PRA group. Variety of equipment types (21). Added for variety of systems. Includes SUbcomponent:

AP1 Originally a reciprocal charging pump, replacement dissimilar to CCP1. Major modification System Equipment New or Component No. Class Environment Replacement RRC Boric acid blender inlet valve no. 8 1 FCV-110A (YIN) MIE Y N Emergency borate valve to 8 8 MIE N Y charQing pump (8104) Volume control tank outlet to CCP 8 8 MIE N Y suction valve No. LCV-112B SI pump 1 9 5 MIE N N Containment recirculation sump, sump strainer, trash rack, and 9 0 ICE Y N vortex suppressor SI accumulator No.1 9 21 ICE N N RWST to charging pump suction 9 8 MIE N N valve No. 8805A SI pump suction valves from 9 8 MIE N N RWST (8923A) RHR Hx 1 10 21 MIE N N RHR pump 2 10 6 MIE N N RHR pump suction valve 8l00A 10 8 MIE N N RHR pump recirculation valve 10 8 MIE Y N FCV-641A RHR pump recirculation valve 10 8 MIE Y N FCV-641B CCW header A FCV-430 14 8 MIE Y N CCW Hx output thermocouple 14 19 MIE N N TE-6 CCW Hx 1 14 21 MIE N N CCW pump 1 14 5 MIE N N CCW surge tank 14 21 OE N N CCW Hx FCV-365 14 7 MIE Y N ASW pump 1 17 6 SWIE N N ASW FCV-602 17 7 MIE N N DG No.1 lube oil electric heater 21 0 DIE Y Y Safety Function Risk RCPC RCIC DHR CF Significance (YIN) N N N Y N Y Y N Y N Y Y N Y N N N N N Y N Y Y Y N N N N N N N N N Y N N N N Y N N N Y N N N N Y N Y N N Y N N N N Y N N N N Y N N N N N N N N N Y N N N Y Y Y Y N Y Y Y Y N Y Y Y N N N N N N N Y Y N Y N Y Y N N Y Y Y Y N IPEEE SSEL IPEEE Enhancement jY/Nl lY/Nl (YIN) N Y N Y N N Y Y N N Y Y N N N N Y N Y Y N N N Y Y Y N Y Y N N Y N N Y N N Y N Y Y Y Y N N Y Y N Y Y N Y Y N Y N N Y Y N Y Y N N N N Walkdown Package No. DC-2 P-VOA-CVCS FCV-110A DC-2-08-P-VOM-CVCS 8104 DC-2-08-P-VOM-CVCS LCV-112B DC-2-09-M-PP-SI P 1 DC-2-09-M-STR-STR-RH R 1 DC-2-09-M-TK-AT1 DC-2-09-P-VOM-SI-2-8805A DC-2-09-P-VOM-SI-2-8923A DC-2-10-M-HX-RHE1 DC-2-10-M-PP-RHRP2 DC-2-10-P-VOM-RHR 8l00A DC-2-10-P-VOM-RHR FCV-641A DC-2-10-P-VOM-RHR FCV-641B DC-2-14-E-P-VOM-CCW FCV-430 DC-2-14-I-E-TE-6 DC-2-14-M-HX-CCWH E 1 DC-2-14-M-PP-CCWP1 DC-2-14-M-TK-CCWST1 DC-2-14-P-VOA-CCW FCV-365 DC-2-17 -M-PP-ASP1 DC-2-17 -P-VOA-SW-2-FCV-602 DC-2-21-E-HT-LOH1 Enclosure1 PG&E DCL-12-119 Attachment C Page 2 of 7 Remarks Added based on modification.

Seismically supported valve Added from SSEL. Seismically supported Added due to association with L TSPIIPEEE modification.

Added as major modification.

Added for variety of environments.

Added due to association with L TSPIIPEEE modification.

Added based on peer review. Associated with L TSPIIPEEE modification.

Added for variety of equipment (19). Electrical location code XTE-006 Includes subcomponent:

CCWAP1 Added from SSEL. New component System Equipment New or Component No. Class Environment Replacement RRC (YIN) DG No. 1 control panel 21 20 DIE N Y DG No.3 control panel 21 20 DIE N Y DG No.1 excitation cubicle 21 20 DIE N Y DG No.3 excitation cubicle 21 20 DIE N Y DG No. 1 DC power supply 21 14 DIE N Y transfer switches DG No.3 DC power supply 21 14 DIE N Y transfer switches DG No.1 engine 21 17 DIE N Y DG No. 3 engine 21 17 DIE N Y DG No.1 radiator A 21 17S DIE N Y DG No.3 radiator A 21 17S DIE N Y Safety Function Risk RCPC RCIC DHR CF Significance (YIN) Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y Y Y Y Y Y Y Y Y Y Y N Y Y Y Y N IPEEE SSEL IPEEE Enhancement (YIN) (YIN) (YIN) Walkdown Package No. N Y N DC-2-21-E-PNL-GQD21 N Y N DC-2-21-E-PNL-GQD23 N Y N DC-2-21-E-PNL-SED21 N Y N DC-2-21-E-PNL-SED23 N N N DC-2-21-E-S-EQD-21 N N N DC-2-21-E-S-EQO-23 Y Y N DC-2-21-M-EN-DEG 1 Y Y N DC-2-21-M-EN-OEG3 N Y N DC-2-21-M-HX-JWR 1 A N Y N DC-2-21-M-HX-JWR3A Enclosure1 PG&E DCL-12-119 Attachment C Page 3 of 7 Remarks Includes relay Nos. -SDR-11/SDR-21

-OCT1-11/0CT1-21

-ESR1-11/ESR1-21

-JWTR-11/JWTR-21

-OPR-11/0PR-21

-OPT1-11/0PT1-21

-OCR-11/0CR-21 DG 2-3 associated with a major modification credited in the IPEEE SPRA, and is dissimilar from other DGs. Includes relay Nos. -SDR-13/SDR-23

-OCT1-13/0CT1-23

-ESR1-13/ESR1-23

-JWTR-13/JWTR-23

-OPR-13/0PR-23

-OPT1-13/0PT1-23

-OCR-13/0CR-23 DG 2-3 associated with a major modification credited in the IPEEE SPRA, and is dissimilar from other DGs. Added for variety of types of equipment (14). Added for variety of types of equipment (14). DG 2-3 associated with a major modification credited in the IPEEE SPRA, and is dissimilar from other DGs. Includes subcomponents:

-DFODT1 -JWP1 -Main Lead Terminal Box -Generator Includes sUbcomponents:

-DFODT3 -JWP3 -Main Lead Terminal Box DG 2-3 associated with a major modification credited in the IPEEE SPRA, and is dissimilar from other DGs.

System Equipment New or Component No. Class Environment Replacement RRC (YIN) DG No. 1 exhaust silencer 21 0 DIE N Y DG NO.3 exhaust silencer 21 0 DIE N Y DG No.1 inlet silencer 21 0 DIE N Y DG NO.3 inlet silencer 21 0 DIE N Y DG No.1 air start receiver A 21 21 DIE N Y DG NO.3 air start receiver A 21 21 DIE N Y DG No.1 inlet air filter 21 0 DIE N Y DG NO.3 inlet air filter 21 0 DIE N Y DG No. 1 fuel off shutoff valve 21 7 DIE N Y header A DG NO.3 fuel off shutoff valve 21 7 DIE N Y header A Post-LOCA sampling room 23 0 MIE N N ventilation duct heater No. 29A Control room ventilation control 23 20 cabinet No. CCR 1 MIE N N CFCU SI system and auto bus 23 20 MIE Y Y transfer relay cabinet, Bus F Control room ventilation air conditioning compressor 23 12 DIE N N CP-37 Auxiliary building ventilation 23 9 DIE N N exhaust fan E-1 Control room ventilation supply 23 10 DIE N N fan S-37 Containment fan cooler No. 1 23 10 ICE N N Safety Function Risk RCPC RCIC DHR CF Significance (YIN) Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N N N N N N N N N N N Y Y Y Y N N N N N N Y Y Y Y N Y Y Y Y Y N N N Y N IPEEE SSEL IPEEE Enhancement (YIN) (YIN) (YIN) N Y N N Y N N Y N N Y N N Y N N Y N N Y N N Y N Y Y N Y Y N N N N N Y N N N N N Y N N N N N Y N N Y N Walkdown Packag_e No. DC-2-21-M-MISC-ES1 DC-2-21-M-MISC-ES3 DC-2-21-M-MISC-IS1 DC-2-21-M-MISC-IS3 DC-2-21-M-TK-AR 1 A DC-2-21-M-TK-AR3A DC-2-21-P-FL-CAF1 DC-2-21-P-FL-CAF3 DC-2-21-P-V-DEG-2-LCV-89 DC-2-21-P-VOA-DEG LCV-87 DC-2-23-E-HT

-2EH-29A DC-2-23-E-PNL-CRC6 DC-2-23-E-PNL-PCCFC 1 DC-2 M-BC-CP-3 7 DC-2-23-M-BF-2E-1 DC-2-23-M-BF-2S-37 DC-2-23-M-BF-CFC2-1 Enclosure1 PG&E DCL-12-119 Attachment C Page 4 of 7 Remarks DG 2-3 associated with a major modification credited in the IPEEE SPRA, and is dissimilar from other DGs. DG 2-3 associated with a major modification credited in the IPEEE SPRA, and is dissimilar from other DGs. DG 2-3 associated with a major modification credited in the IPEEE SPRA, and is dissimilar from other receivers.

DG 2-3 associated with a major modification credited in the IPEEE SPRA, and is dissimilar from other DGs. DG 2-3 associated with a major modification credited in the IPEEE SPRA, and is dissimilar from other DFODTs. Added based on recommendation from PRA group. Added for variety of systems and for a variety of types of equipment (10). Added as new component.

Includes relay nos.: -2F1,2F1A,2F2,2F2A

-4HFXF1, 4HFXF2 Located in 480V switchgear room Bus F Added for variety of environments.

Added for safety function.

Includes coil cooling units C35/C37 as sUbcomponents.

System Equipment New or Component No. Class Environment Replacement RRC (YIN) ASW pump compartment exhaust fan E-104 23 9 SWIE N Y 480-V switchgear ventilation 23 10 OE N N exhaust fan E-45 Auxiliary building ventilation 23 9 DIE N N supply fan S-33 480-V switchgear ventilation 23 9 OE N N supply fan S-45 Control room ventilation air 23 10 conditioning condenser CR37 DIE N N 480-V switchgear ventilation shutoff (discharge) damper 23 7 OE N N FCV-5045 Control room ventilation supply 23 8 DIE N N fan suction damper No. MOD-10 Control room ventilation supply 23 8 DIE N N fan suction damper No. MOD-9 Control room ventilation filter 23 18 DIE N N FU39 Containment purge valve 23 7 ICE N N FCV-660 Containment purge valve RCV-11 23 7 ICE N N Hydrogen monitoring system 23 8 ICE N N supply valve FCV-238 Post-LOCA sample system return line to containment valve 23 8 MIE N N FCV-700 ASW FCV-602 backup air 25 21 MIE N N accumulator Auxiliary relay rack No. RNARA 36 20 MIE N N Process control and protection system -process control rack 36 18 MIE N N No.1A SSPS -input relay cabinet 38 20 MIE N Y No. RNSIA SSPS -logic cabinet No. RNSLA 38 20 MIE N Y SSPS -output relay cabinet 38 20 MIE N Y No. RNSOA Safety Function Risk RCPC RCIC DHR CF Significance (YIN) Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N N N N N N Y Y Y Y N N N N N N N N N N N N N N N N N N N Y N N N N Y N N N N Y N N N N Y N N Y Y N N Y N N N N Y Y N Y N N Y Y Y Y N Y Y Y Y N Y Y Y Y IPEEE SSEL IPEEE Enhancement (Y/NJ iY/N) (YIN) Y N N Y Y N N N N Y Y N N Y N N Y N N N N N N N N N N N Y N N Y N N N N N N N N N N N Y N N Y Y N Y N N Y N N Y N Walkdown Package No. DC-2-23-M-BF-E-104 DC-2-23-M-BF-E-45 DC-2-23-M-BF-S-33 DC-2-23-M-BF-S-45 DC-2-23-M-HX-CR37 DC-2-23-P-D-VAC-2-FCV-5045 DC-2-23-P-D-VAC-2-MOD-10 DC-2-23-P-D-VAC-2-MOD-9 DC-2-23-P-FL-FU41 DC-2-23-P-VOA-VAC FCV-660 DC-2-23-P-VOA-VAC RCV-11 DC-2-23-P-VOS-VAC FCV-*238 DC-2-23-P-VOS-VAC FCV-700 DC-2-25-M-TK-B UAS-602 DC-2-36-E-PN L -R NARA DC-2-36-I-PNL-RN01A DC-2-38-I-PNL-RNSIA DC-2-38-I-PNL-RNSLA DC-2-38-I-PNL-RNSOA Enclosure1 PG&E DCL-12-119 Attachment C Page 5 of 7 Remarks Added from SSEL. Added for variety of environ ments. Added for safety function.

Added for variety of environments.

Variety of types of equipment (10) Associated with IPEEE modification.

Added based on recommendation from PRA group. Added based on recommendation from PRA group. Added based on recommendation from PRA group. Added for variety of equipment types (8) Added for variety of equipment types (8) Added for variety of systems. Associated with IPEEE modification.

System Equipment New or Component No. Class Environment Replacement RRC (Y/N) SSPS -test cabinet No. RNSTA 38 20 MIE N Y Reactor trip switchgear/control 41 panel No. B1 20 MIE N Y Process control and protection system -computer input rack 43 18 MIE N N No. RNCI1 4160-V switchgear, Bus G 63 3 MIE Y Y 4160-V safeguard relay panels 63 20 MIE N Y 4160-V potential transformer, 63 4 MIE N Y Bus G 480-V breaker cabinets (Load Centers), Bus F 64 2 MIE N Y Auxiliary relay panel 64 20 MIE N Y 4160-V/480-V transformer 64 4 No. THF10 MIE N Y 120-Vac instrument breaker panel 65 2 MIE N Y No. PY21 120-VacC inverter No. IY21 65 16 MIE Y Y Regulating transformer 65 4 MIE Y Y No. TRY21 125-Vdc batteries and battery 67 15 MIE Y Y rack No. BA T21 125-Vdc battery charger 67 16 MIE Y Y No. BTC21 125-Vdc distribution panel 67 No. PD25 14 MIE N N 125-Vdc switchgear/breaker panel 67 2 MIE N Y No. SD21 Control console No. CC1 96 20 MIE N Y Safety Function Risk RCPC RCIC DHR CF Significance (Y/N) N Y Y Y Y N N N N N Y Y N Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y N Y Y Y Y Y N N N N N Y Y Y Y N Y Y Y Y N IPEEE SSEL IPEEE Enhancement (YIN) (YIN) (YIN) N Y N N Y N N Y Y Y Y N N Y N N Y N Y Y N N Y N N Y N N Y N Y Y N N N N Y Y N Y Y N N N N Y Y N N Y N Walkdown Package No. DC-2-38-I-PNL-RNSTA DC-2-41-E-PN L-PORTB 1 DC-2-43-I-PNL -RNCI1 DC-2-63-E-LC-SHG DC-2-63-E-PNL-RHG DC-2-63-E-XF-SHG22PT DC-2-64-E-LC-SPF DC-2-64-E-PNL-ARP DC-2-64-E-XF-THF10 DC-2-65-E-LC-PY21 DC-2-65-E-UPS-IY21 DC-2-65-E-XF-TRY21 DC-2-67 -E-BT -BAT21 DC-2-67 -E-BTC-BTC21 DC-2-67 -E-LC-PD25 DC-2-67-E-LC-SD21 DC-2-96-E-PNL-2CC1 Enclosure1 PG&E DCL-12-119 Attachment C Page 6 of 7 Remarks Includes breakers and relays: -52RTA, 52RTB -27UVXA, 27UVXB Associated with IPEEE modification.

Breakers replaced as part of major modification.

Includes relays: -51XHG14, 51XHG13 -51HG9, 51HG8, 51HG7, 51HG12 -51 HG6, 51 HG5, 51 HG1 0, 51 HG13, 51HG14 -27DCHG12, 27DCHG8 -43HG12-TS Includes subcomponent relays: 1 F-11/42-2F-11 1 F-23/42-2F-23 Associated with 480-V motor control centers. Added for variety of types of equipment (4) and as replacement equipment.

Batteries and racks replaced as part of major modification.

No safety function, but seismically qualified.

Added for a variety of types if equipment (14).

Safety Function System Equipment New or Component No. Class Environment Replacement RRC RCPC RCIC DHR (YIN) Main control board No. VBi 96 20 MIE N Y Y Y Y Hot shutdown panel 96 20 MIE N Y Y Y Y Mechanical panel No. PM-i01 (CCW supply header 96 20 MIE N N N N Y instrumentation)

Mechanical panel No. PM-i03 96 20 OE Y N N N N (SG No.1 instrumentation)

Mechanical panel No. PM-i85 (condensate storage tank 96 20 MIE Y N N N N instrumentation)

Mechanical panel No. PM-45 96 20 MIE Y N N N N (SG level instrumentation)

Mechanical panel No. PM-79 (reactor levellwide range pressure 96 20 ICE N N N Y Y instrumentation)

Mechanical panel No. PM-89 (RC loop 2 cold leg 96 20 ICE N N N Y Y instru mentation)

Risk IPEEE CF Significance SSEL IPEEE Enhancement (YIN) (YIN) (YIN) (YIN) Y N N Y N Y N N Y N N N Y N N N N Y N N N N Y N N N N Y N N N N Y N N N N Y N N Walkdown Package No. DC-2-96-E-PNL-2VBi DC-2-96-E-PNL-HSP DC-2-96-M-PNL-PM-101 DC-2-96-M-PNL-PM-103 DC-2-96-M-P N L -PM-i85 DC-2-96-M-PNL-PM-45 DC-2-96-M-PNL-PM-79 DC-2-96-M-PNL-PM-89 Enclosure1 PG&E DCL-12-119 Attachment C Page 7 of 7 Remarks Includes control switch Nos.: -9003A-CS, 9003B-CS -8923A-CS, 8923B-CS -FCV-430-CS, FCV-431-CS

-CCWPi-CS, CCWP2-CS, CCWP3-CS -ASP1-CS, ASP2-CS Includes control switch Nos.: -CCWP1-CSH, CCWP2-CSH, CCWP3-CSH -ASPi-CSH, ASP2-CSH Contains transmitter Nos.: -FT-65, FT-68, FT-69 Added from SSEL. Contains transmitter Nos.: -PT-514, PI-518 Contains transmitter No. L T -40. Contains transmitter No. L T-529. Contains transmitter No. PT-403. Contains transmitter No. PT-460.

Attachment 0 Enclosure1 PG&E DCL-12-119 Attachment D Unit 2: Seismic Walkdown Equipment List-2 Base List 2 Component Quick opening transfer tube closure Spent fuel pool pumps Spent fuel pool heat exchanger Spent fuel pool pump transfer switches Spent fuel pool cooling system temperature instrumentation Fuel handling building ventilation system supply fans Fuel handling building ventilation system fan flow control damper Fuel handling building ventilation system mode dampers Fuel handling building ventilation system backdraft dampers (fan shutoff dampers) Fuel handling building ventilation system normal exhaust fan Fuel handling building ventilation system normal backdraft dampers (fan shutoff dampers) Fuel handling building ventilation system normal fan flow control damper Enclosure1 PG&E DCL-12-119 Attachment E Attachment E Unit 2: Seismic Walkdown Equipment List-2 Rapid Drain-Down List Spent Fuel Pool Rapid Drain-Down Equipment List Component Comments aOTTC Verify condition of aOTTC SFP fill piping from hold-up tank recirculation Verify that pipe terminates above elevation 122 ft pumps and check for anti-siphon hole. Suction piping to SFP pumps Verify that the SFP wall penetration is above elevation 122 ft. Return piping from SFPCS Hxs Verify that anti-siphon hole is present and unobstructed.

SFP skimmer suction piping Verify that suction point is above elevation 122 ft. SFP skimmer return piping Verify that termination point is above elevation122 ft. Fuel transfer tube expansion joint Verify condition of expansion joint. Return piping from makeup water transfer Verify that removable spool has been removed or that submerged termination of pipe is above pumps elevation 122 ft.

Attachment F Unit 2: Seismic Walkdown Equipment List-2 List Rapid New or System Equipment S-Q Drain-Replacement Component No. Class Environment (YIN) down (YIN) SFP fill piping from hold-up tank 8 0 MIE N Y N recirculation pumps SFPC temperature 13 19 MIE Y N N instrumentation SFP Hx 13 21 MIE Y N N SFP pump 1 13 5 MIE Y N N SFP pump transfer switch No.2 13 1 MIE Y N N SFP skimmer suction piping 13 0 MIE N Y N line-1080 SFP skimmer suction piping 13 0 MIE N Y N line-1118 SFP skimmer return piping 13 0 MIE N Y N line-1121 SFP skimmer return piping 13 0 MIE N Y N line-1122 SFP skimmer return piping 13 0 MIE N Y N line 1123 Suction piping to SFP pumps 13 0 MIE Y Y N -----'-------

.... -WID Package No. DC-2-08-P-P-LlNE-1119 DC-2-13-1-I-TI-653 DC-2-13-M-HX-SFPHE1 DC-2-13-M-PP-SFPP1 DC-2-13-SFPPTS1 DC-2-13-P-P-LlNE-1080 DC-2-13-P-P-LlNE-1118 DC-2-13-P-P-LlNE-1121 DC-2-13-P-P-LlNE-1122 DC-2-13-P-P-LlNE-1123 DC-2-13-P-P-LlNE-154 Enclosure1 PG&E DCL-12-119 Attachment F Page 1 of 2 Remarks Verify that pipe terminates above elevation 122 ft and check for anti-siphon hole. Mounted on SFPCS Hx outlet piping. Verify that suction point is above elevation 122 ft. Verify that suction point is above elevation 122 ft. Verify that termination point is above elevation 122 ft. Verify that termination point is above elevation 122 ft. Verify that termination point is above elevation 122 ft. Verify that the SFP wall penetration is above elevation 122 ft.

Rapid System Equipment S-Q Drain-Component No. Class Environment (YIN) down Return piping from SFPCS Hxs 13 21 MIE N Y Return piping from makeup water 16 0 MIE N Y transfer pump (line-2242)

FHBVS normal exhaust Fan E-4 23 9 DIE Y N Fuel transfer tube expansion joint 42 0 MIE Y Y QOTTC 42 0 ICE Y Y New or Replacement WID Package (YIN) No. N DC-2-13-P-P-LlNE-159 N DC-2-16-P-P-LlNE-2242 N DC-2-23-M-BF-2E-4 N DC-2-42-M-EJ-FTC-2-EJ2 N DC-2-42-M-MISC-QOTTC Enclosure1 PG&E DCL-12-119 Attachment F Page 2 of2 Remarks Verify that anti-siphon hole is present and unobstructed.

Verify that removable spool has been removed or that submerged termination of pipe is above elevation 122 ft. Similar SSCs in a damp indoor environment have . been included in the SWEL-1. i ,

Attachment G Enclosure 1 PG&E DCL-12-119 Attachment G Unit 2: Potentially Adverse Seismic Conditions Entered into the Corrective Action Program Description Walkdown SWC/AWC Finding Status Damper stiffener channels not shown on 2-CP-37 Configuration Note drawing Loose clamps on conduit No. K8115 2-E-45 Degraded -Other Note Loss of shim on RR 2025-8RT 2-FCV-41 Degraded-Other Note Gap issue at valve MS-2-FCV-25 DC-2-04-P-VOA-MS-2-FCV-41 Configuration Note (clearance to the adjacent bracket) Clearance between hand wheel for MS-2-Note 1020 & MS-2-FCV-41 DC-2-04-P-VOA-MS-2-FCV-41 Configuration CCW Hx 2-1 support: cracked concrete Note (edge of pedestal)

DC-2-14-M-HX-CCWHE1 Degraded-Other Use of finger shims on hanger No.28-44R Note (Not shown on drawing) DC-2-17 -M-PP-ASP1 Configuration Anchorage anomaly on DG 2-3 exhaust Note silencer (washer too small for elongated DC-2-21-M-MISC-ES3 Configuration hole) Weld size discrepancy for Fan 2S-37 DC-2-23-M-BF-2S-37 Configuration Note Fan S-33: Corroded skid & anchor bolts on DC-2-23-M-BF-S-33 Degraded-Closed one corner. Corrosion Note Damper stiffener channels not shown on DC-2-23-P-D-VAC-2-MOD-10 Configuration drawing Incorrect drawing for FU41 support anchor Note (calculation reflects as-built)

DC-2-23-P-FL-FU41 Configuration Panel RNARA base connection weld Note anomaly DC-2 E-PN L -RNARA Configuration Panel RNARB base connection weld DC-2-36-E-PNL-RNARA

-EOC Configuration Note anomaly (EOC during RNARA inspection)

UPS IY21 mounting bolts connecting the DC-2-65-E-U PS-IY21 Configuration Note transformer to grating (missing screws) Potential interaction between light fixture & DC-2-99-I-PNL-RN01 A Spatial Note rack RN01A Interaction

-SISI Note: In accordance with EPR11025286, these conditions have been entered into the CAP. These items are open and have been prioritized in accordance with CAP guidance.

Attachment H Enclosure 1 Attachment H PG&E DCL-12-119 Unit 2: Inaccessible Component List Seismic Walkdown Area Walkdown Component Checklist No. Checklist No. Outage DG No. 2-1 control panel DC-2-21-E-PNL-GQD21 2-DEG-21 2R17 DG No. 2-1 excitation cubicle DC-2-21-E-PNL-SED21 2-DEG-21 2R17 DG No. 2-1 radiator No. 1A DC-2-21-M-HX-JWR 1 A 2-DEG-21 2R17 DG No. 2-3 control panel DC-2-21-E-PN L-GQD23 2-DEG-23 2R17 DG No. 2-3 excitation cubicle DC-2-21-E-PNL-SED23 2-DEG-23 2R17 DG No. 2-3 radiator No. 3A DC-2-21-M-HX-JWR3A 2-DEG-23 2R17 480-V breaker cabinet (load center) DC-2-64-E-LC-SPF 2-MCC-F 2R17 Bus F 4160-V/480-V transformer No. DC-2-64-E-XF-THF1 0 2-MCC-F 2R17 THF10 Reactor trip switchgear/control DC-2-41-E-PNL-PORTB1 2-PORTB1 2R17 panel No. PORTB1 Mechanical panel No. PM-89 DC-2 M-P N L -P M-89 2-PM-89 2R17 (RC Loop 2 cold leg instrumentation)

SI accumulator No. 2-1 DC-2-09-M-TK-AT1 2-SIAT1 2R17 Containment recirculation sump, DC-2-09-M-STR-STR-RH R 1 2-STR-RHR1 2R17 sump strainer, trash rack, and vortex suppressor QOTTC DC-2-42-M-MISC-QOTTC 2-QOTTC 2R17 Hydrogen monitoring system supply DC-2-23-P-VOS-VAC-2-FCV-2-FCV-238 2R17 valve VAC-2-FCV-238 238 Containment purge valve DC-2-23-P-VOA-VAC-2-RCV-2-PEN62 2R17 VAC-2-RCV-11 11 Containment purge valve DC-2-23-P-VOA-VAC-2-FCV-2-PEN61 2R17 VAC-2-FCV-660 660 Mechanical panel No. PM-45 DC-2-96-M-P N L -PM-45 2-PM-45 2R17 (SG level instrumentation)

Containment fan cooler No. 2-1 DC-2-23-M-BF-CFC2-1 2-CFC21 2R17 125-Vdc switchgear/breaker panel DC-2-67 -E-LC-SD21 2-BTC21 2R17 No. SD21 4160-V switchgear Bus G DC-2-63-E-LC-SHG 2-4 KV-G 2R17 4160-V safeguard relay panel Bus G DC-2-63-E-PNL-RHG 2-4 KV-G 2R17 4160-V potential transformer Bus F DC-2-63-E-XF-SHF22PT 2-4 KV-G 2R17 Attachment I Unit 2: Seismic Walkdown Checklists SWC Number Number of SWC Number Checklist pages of LBEs DC-2-03-I-E-TE-117 2 0 DC-2-03-M-PP-AFWP 1 2 0 DC-2-03-M-PP-AFWP2 2 0 DC-2-03-P-VOH-FW-2-LCV-110 2 2 DC-2-03-P-VOH-FW-2-LCV-115 2 0 DC-2-03-P-VOM-FW-2-LCV-106 2 0 DC-2-04-LD30 2 0 DC-2-04-P-V-MS-2-FCV-152 2 0 DC-2-04-P-VOA-MS-2-FCV-41 2 3 DC-2-04-P-VOA-MS-2-PCV-20 2 0 DC-2-04-P-VOM-MS-2-FCV-37 2 0 DC-2-04-P-VR-MS-2;.RV-13 2 0 DC-2-04-P-VR-MS-2-RV-3 2 0 DC-2-04-P-VR-MS-2-RV-61 2 0 DC-2-04-P-VR-MS-2-RV-8 2 0 DC-2-08-I-T-LT-102 2 0 DC-2-08-M-HX-SWH E 1 2 0 DC-2-08-M-PP-CCP1 2 0 DC-2-08-M-PP-CC P3 2 0 DC-2-08-P-P-LlNE-1119 2 0 DC-2-08-P-VOA-CVCS-2-FCV-110A 2 0 DC-2-08-P-VOM-CVCS-2-8104 2 0 DC-2-08-P-VOM-CVCS-2-LCV-112B 2 0 DC-2-09-M-PP-SIP1 2 0 DC-2-09-P-VOM-SI-2-8805A 2 0 DC-2-09-P-VOM-SI-2-8923A 2 0 DC-2-10-M-HX-RHE1 2 0 DC-2-10-M-PP-RHRP2 2 0 DC-2-10-P-VOM-RHR-2-8700A 2 0 DC-2-10-P-VOM-RHR-2-FCV-641A 2 0 DC-2-1 0-P-VOM-RHR-2-FCV-641 B 2 0 DC-2-13-1-I-TI-653 2 0 DC-2-13-M-HX-SFPHE1 2 0 DC-2-13-M-PP-SFPP1 2 0 DC-2-13-P-P-LlNE-1080 2 0 Enclosure 1 PG&E DCL-12-119 Attachment I Page 1 of 3 Number of LBE pages 0 0 0 2 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SWC Number DC-2-13-P-P-LlNE-1118 DC-2-13-P-P-LlNE-1121 DC-2-13-P-P-LlNE-1122 DC-2-13-P-P-LlNE-1123 DC-2-13-P-P-LlNE-154 DC-2-13-P-P-LlNE-159 . DC-2-13-SFPPTS1 DC-2-14-E-P-VOM-CCW-2-FCV

-430 DC-2-14-I-E-TE-6 DC-2-14-M-HX-CCWH E 1 DC-2-14-M-PP-CCWP1 DC-2-14-M-TK-CCWST1 DC-2-14-P-VOA-CCW-2-FCV-365 DC-2-16-P-P-LI N E-2242 DC-2-17 -M-PP-ASP1 DC-2-17 -P-VOA-SW-2-FCV-602 DC-2-21-E-HT-LOH1 DC-2-21-E-S-EQD-21 DC-2-21-E-S-EQD-23 DC-2-21-M-EN-DEG1 DC-2-21-M-EN-DEG3 DC-2-21-M-MISC-ES1 DC-2-21-M-MISC-ES3 DC-2-21-M-MISC-IS1 DC-2-21-M-MISC-IS3 DC-2-21-M-TK-AR1A DC-2-21-M-TK-AR3A DC-2-21-P-FL-CAF1 DC-2-21-P-FL-CAF3 DC-2-21-P-V-DEG-2-LCV-89 DC-2-21-P-VOA-DEG-2-LCV-87 DC-2-23-E-HT

-2EH-29A DC-2-23-E-PNL-CRC6 DC-2-23-E-PNL-PCCFC1 DC-2-23-M-BC-CP-37 DC-2-23-M-BF-2E-1 DC-2-23-M-BF-2E-4 DC-2-23-M-BF-2S-37 Number of SWC Number Checklist pages of LBEs 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 2 2 0 2 1 2 0 2 0 2 2 2 0 2 0 2 0 2 0 2 0 2 1 2 0 2 1 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 2 Enclosure 1 PG&E DCL-12-119 Attachment I Page 2 of 3 Number of LBE pages 0 0 0 0 0 0 0 0 0 2 0 1 0 0 2 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 SWC Number DC-2-23-M-BF-E-104 DC-2-23-M-BF-E-45 DC-2-23-M-BF-S-33 DC-2 M-B F -S-45 DC-2-23-M-HX-CR37 DC-2-23-P-D-VAC-2-FCV-5045 DC-2-23-P-D-VAC-2-MOD-10 DC-2-23-P-D-VAC-2-MOD-9 DC-2-23-P-FL-FU41 DC-2-23-P-VOS-VAC-2-FCV-700 DC-2-25-M-TK-BUAS-602 DC-2-36-E-PNL-RNARA DC-2-38-I-PN L-RNSIA DC-2-38-I-PNL-RNSLA DC-2-38-I-PNL-RNSOA DC-2-38-I-PN L-RNST A DC-2-42-M-EJ-FTC-2-EJ2 DC-2-43-I-PNL-RNCI1 DC-2-64-E-PNL-ARP DC-2 E-LC-PY21 DC-2-65-E-U PS-IY21 DC-2-65-E-XF-TRY21 DC-2-67 -E-BT -BAT21 DC-2-67 -E-BTC-BTC21 DC-2-67 -E-LC-PD25 DC-2-96-E-PNL-2CC1

DC-2-96-E-PNL-2VB 1 DC-2-96-E-PNL-HSP DC-2-96-M-PNL-PM-101 DC-2-96-M-PNL-PM-103 DC-2-96-M-PNL-PM-185 DC-2-96-M-PNL-PM-79 DC-2-99-I-PN L -RNO 1 A Number of SWC Number Checklist pages of LBEs 2 0 2 1 2 2 2 1 2 2 2 1 2 1 2 0 2 1 2 0 2 0 2 1 2 0 2 0 2 0 2 0 2 1 2 0 2 0 2 0 2 1 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 1 Enclosure 1 PG&E DCL-12-119 Attachment I Page 3 of 3 Number of LBE pages 0 1 2 1 2 1 18 0 1 0 0 5 0 0 0 0 1 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 1 Note: Pages include applicable portions of the checklists and LBE required by EPRI 1025286 guidelines.

Seismic walkdown Checklist (S\NC) Status: Y Equipment 10 No OC-2-Q3-I-E-TE-117 Equipment Class: 19 Equipment

==

Description:==

AFW Lead Temperature Element location:

Building:

Pipeway FloorE!. ill Room, Area: 2::.1E11Z Manufacturer, model. Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments .. Anchorage

1. Is the anchorage configuration verificatIon required (i.e. is the item one of the 50% of SWEl items requiring such verification)?

2. Is the anchorage free of bent, broken, mIssing or loose hardware?

No broken, bent, or missing hardware 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

Some minor surlace corrosion on lower anchor. No Issues. 4. Is the anchorage free of visible cracks In the concrete near the anchors? No cracks near the anchors. 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is one of the 50% for which a n anchorage conflg uratlon verification Is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

Potential soft target is the flex line. No credible interaction sources. 8. Are overhead eqUipment, distribution systems, ceiling tiles, and lighting, and masonJ)' block walls not likely to collapse onto the equipment?

Structural steel, conduit, and pipe are a/I well supported.

9. Do attached lines have adequate flexibility to avoid damage? 10. Based on the above seismic Interaction evaluations, is equipment free of potentially adverse seismic interaction effects? The component Is relatively sheltered by other pipes and supports.

It would be difficult to hit If Items did fall from above Other Adverse Conditions N y y y N/A y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page 10f9 Seismic Walkdo\Nl1 Checklist (SWC) Status: y Equipment 10 No OC-2-03-I-E-TE-117 Equipment

==

Description:==

AFW lead Temperature Element Comment: Evaluated by; Equipment Class: 19 Page 2 of9 SeIsmic Walkdown Checklist (S\IVC) Status: Y Equipment 10 No OC-2-Q3-M-PP-AFWP1 Equipment Class: Equipment

==

Description:==

AfW Pump No.1 (Turbina.-Driven)

... _. __ ._--_._._--_

...... -._ .. _._ ... _.-_ ... -... __ .. _-_.-_._._

... _. __ .... -.-.--_ .. _._._-.-... -... _---_._-_.--

.. _ ..... --.. _ .. _----location:

Building: floor EI. .12Q Room, Area: 2-AEWP1 Manufacturer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipme!1t on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i.e. Is the item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

All anchor bolts are present and In good condition.

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

No corrosion Is present. N y Y 4. Is the anchorage free of visible cracks in the concrete near the anchors? Y Very mild spalling has occurred on the concrete pedestal.

No structure/Issues.

No cracks in concrete or pedestal.

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item is NIA one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

y No issues were Identified.

Interaction Effects 7. Are soft targets free from Impact by-nearby equipment or structures?

No credible sources could impact soft targets. 8. Are overhead eqUipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

Overhead piping and cable trays looked adequately secured. Lights are wall mounted. No ceiling tiles or block walls In the area. 9. Do attached lines have adequate flexibility to' avoid damage? Afl attached lines appear to have adequate flexibility.

10. Based on the above seismic interaction evaluations.

is equipment free of potentially adverse seIsmic Interaction effects? No issues were Identified.

Other Adyerse Conditions y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page 1 of 13 Seismic WalkdovJn Checklist (SWC) Status: Y Equipment 10 No DC-2-03-M-PP-AFWP1 Equipment Class: .§ Equipment

==

Description:==

AFW Pump No 1 (Turbine-Qrjven)

Comment: Evaluaied by: KIM Ila.t§;. 10/ I 5/J.olC>-SMM Page 2 of13 I I I: ! Seismic W8lkdown CheckrlSt (SWC) Status: Y Equipment 10 No PC-2-03-M-PP-AFWP2 Equipment Class: §. Equipment

==

Description:==

AEW pump No.2 (Motor-Driven) "---_._----------

Location:

Building:

AY2illiiwl Roar Et. .1.QQ Room. Area: 2.AEWP2 Manufacturer, model. Etc. louis Allis COGS 600HP Moto':; Byron Jackson 3X6X9E-9STG Pump Instructions for Completing Checklist ThIs checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL The space below each of the following questions may be used to record the results of Judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

_._-.. _-_.-_._------_._

... _------_.

Anohorage

1. Is the anchorage configuration verification required (i.e, Is the Item one of the 60% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent, broken. missing or loose hardware?

,3. Is the anchorage free of corrosion that (s more than mild surface oxidation?

4. Is the anchorage free of visible cracks in the concrete near the anchors? Some mInor spaliing or chipping of concrete pad around perimeter.

Judged to be structurally Insignificant.

6. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is one of 1he 50% for which an anchorage configuration verification Is required.)

(6) 1-114" anchor bolts through skid. 6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seIsmic condiUons?

Interaction Effacts 7. Are soft targets free from Impact by nearby equipment or structures?

Some lube all reservoirs at ends of pump and motor and some flexible tubing may be considered soft targets. Judged to be well protected and no vIsible sources that would fall to Impact them. 8. Are overhead equipment.

distribution systems, ceiling Hies, and lighting.

and masonry block walls not likely to collapse onto the equIpment?

9. Do attached lines have adequate nexibility to avoid damage? 10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seIsmIc Interaction y y y y y y y y y y Qther AdVerse Conditions

11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page lof9 Seismic Walkdo\l\ll1 Checklist (SWC) . Status: Y Equipment 10 No OC-2-03-M-PP-AFWP2 Equipment Class: § Equipment

==

Description:==

AFW Pump No.2 (Motor-Driven) ----------_. .. --.--...... -.. --------

Evaluated by' /0* {b-1'2-( Page 2 of9

, . Seismic Walkdovun Checklist (SWC) Status: Y Equipment 10 No DC-2-Q3-p.VOH-J=W-2-LCV-11Q Equipment Class: Z Equipment

==

Description:==

AFW pump Discharge to Steam Generator leyel CQntroI Valves location!

Building: FloorEI. lli Room. Area: 2-lCV-110 Manufacturer, model. Etc. ASCO NH92W6002l;2BND304XXXOOX18 Instructrons for Completing Checklist This checklist may be used to document the results of the SeismIc Walkdown of an Item of equIpment on the SWEL. The space befow each of the following questions may be used to record the results of Judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Ancboraga

1. Is the anchorage cOnfiguration verification requIred (I.e, Is the Item one of the 60% of SWEL Ilems requiring such verification)?

2. Is the anchorage free of bent, broken. missing or loose hardware?

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

4. Is the anohorage free of Visible cracks In the concrete near the anohors? 6. Is the anchorage configuration consistent with plant documentation? (Note: ThIs quesHon only applies If the Item Is one of the 50% for which an anchorage configuration verification Is required.)

e. Based on the above anchorage evaluations.

Is the anchorage free of potentially adverse seismic conditions?

Inlaractlon Eff9gl1 7. Are soft targets free from impact by nearby equipment or structures?

Prot8otsd by overh8sd grating. 8. Are overhead eqUipment, dlstribution systems. ceiling tiles, and lighting.

and masonry block walls not likely to collapse onto the equipment?

9. 00 attached lines have adequate flexibility to avoid damage? 10. Based on the above seismIc Interscllon evaluations.

Is equIpment free of potentially adverse seismic Interaction effects? . Other Adver§9 Conditions N y y N/A N/A y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Op8rator Is braced agaInst steel structure.

Plpe/s free to slld8in axla! direction.

Pipe Is braced In axial direction aftsr 1 bend about 10 tt beneath floor grating end about 4' from valve. Dlfferentlaf displacement b8twe8n anchor poInts may stress yoke. Se8 Attachment 1 for disposillon.

Page 1 of 12 I .1 Seismic Walkdo1M1 Cheddist (SWC) Status: y Equipment 10 No PC-2-03-P.VOH-FW-2-LCV-110 EquIpment Class: 1 Equipment

==

Description:==

AFW Pump DIscharge to Steam Generator Level Control Valves Comment: Minor surface corrosion on valve and It's supports Judged to be/nslgnlfioant.

Pipe to the north of the valve (Line (75) Is oorroded.

See Attachment 2 for dlsposltfon.

Evart/aled by' FFG --::=r;;;;p SMM / Page 2 of 12

Walkdown Checklist (SWC) Diablo Canyon Power Plant, Unit 6-Equipment No.

0 LIcensing Basis Evaluation Issue: Attachment 1, Page 1 of 1 Operator is braced against steel structure.

Pipe is free to slide in axial direction.

Pipe is braced in axial d;rection after 1 bend about 10" beneath floor grating and aboul 4' from valve. Differential displacement between anchor points may stress yoke. Evaluation:

Current piping stress analysis.

G-016-02, takes into account the differential motio'n between the above supports.

The seismic anchor motIon (SAM) has been performed for DE! DOE, and HOSGRI earthquakes.

The valve operator load isquaJified as part of vatve operator qualification.

Hence the issue has been resolved. . It should be noted that the relative displacement between two civil beams is less thqn 1/16 inch. Therefore it is rJot a significant issue. Notification Required:

No Evaluated by: .,-.....,......&41-.:-;;.....

.. ......... ___

____ ---:.. __ Reviewed by: ____

Seismic Walkdown Checklist (SWC) Diablo Canyon Power Plant, Unit Equipment No. DC-2-03-P-VOH-FW-2-LCV-110 Attachment g, Page 1 of 1 Licensing Basis Evaluation Issue: Inlet piping for valve no. FW-2-LCV-110 (Line No. 575) has significant surface corrosion.

Evaluation:

considered to be surface corrosion that will not compromise the structural integrity of thee pipe. Cleaning and repainting recommended. Notification Required:

Yes (50509305)

Evaluated by: . L tL,\'H \ S'/2,f 1, 1.--Reviewed by:

__

Seismic WalkdolM1 Checklist (SWC) Status: y Equipment 10 No DC-2-03-P-VOH-EW"2-LCY-115 Equipment Class: Z Equipment

==

Description:==

AFW pump Discharge to Steam Generator Level Control Valves ............

_.. _ ....... _ .. ----. Location; Building:

Auxiliarv . Floor EL ill Room. Area: 2-AEWP2 Manufacturer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space is provided at the end of this for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (I.e, is the item one of the 50% of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken. missing or loose hardware?

All attaching bolts are present and In good condition.

3. Is the anchorage free of corrosion that is more than mild surface oxidation?

No corrosion Is present. 4. Is the anchorage free of vIsible cracks in the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item is one of the 50% for which an anchorage configuration verification is required;)

6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

No Issues were Identified.

Interaction Effecfs 7. Are soft targets free from impact by nearby equipment or structures?

No credible sources can Impact soft targets. 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equIpment?

All overhead equipment and lights are adequately secured. No block walls or ceiling tiles in the area. 9. Do attached lines have adequate f1exibllity to avoid damage? All attached lines use flexible conduit. 10. Based on the above seismic Interaction evaluations, is equipment free of potentially adverse seismic Interaction effects? No interaction Issues were identified.

Other Adverse Conditions N y y N/A N1A Y Y Y Y Y 11. Have you looked for and found no other seIsmic conditions that could adversely affect the safety function of the Y equipment?

Page 1 of 13 Seismic Walkdo1M1 Checklist (SWC) Status: Y Equipment 10 No OC-2-03-P-VOH-FW-2-lCV-115 Equipment Class: Z Equipment

==

Description:==

AFW Pump Discharge to Steam Generator leyel Control Valves '. _. -.. -.. -._-.---.--.. ---_._._----_

.... _---....... __ .. _-_ ...... ---_._----------

.... Comment: 45" operator height to the center of the pipe. 2" diameter pipe at valve/pipe interface and widens to 3" diameter pipe. Seismic bracing In both lateral direoUons at top of yoke. Evaluated by; KTM SMM Page-2 of 13 :.

; : \ Seismic Walkdovun Checklist (S\IVC) Status: Y Equipment 10 No PC-2-03-P-VOM-EW-2-LCV-106 Equipment Class: a Equipment

==

Description:==

Turbjne:Driven AFW Pump Discharge to Steam Generator Leyel Control Valvjils Location:

Bunding: FloorE!. ill Room. Area: 2-LeY-1iP Manufacturer, model. Etc. LirnitOrgue Instructions for Completing Checklist This checklist may be used to document the results of the SeIsmic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of 1his checklist for documenting other comments.

Anchorage . 1. Is the anchorage configuration verification required (i.e, is the item one of the 50% of SWEL items requiring such verification)?

2. Is the anchorage free of bent. broken. missIng or loose hardware?

All attaching bolts are present. 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

Mild surface corrosion was seen near valve/pipe connection.

Notification of corrosion had already been Identified.

Judged to be ok. 4. Is the anchorage free of vlstble cracks In the concrete near the anchors? N y y N/A 5. Is the anchorage configuration consistent with plant documentation? (Note: This quesUon only applies If the item is N/A one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations.

Is the anchorage free of potentially adverse seismic conditions?

y No Issues were identified.

InteractiQn Effects 7. Are soft targets free from Impact by nearby equIpment or structures?

No credible sources were Identified that could Impact soft targets. a. Are overhead equipment.

distribution systems, ceiling tiles. and lighting, and masonry block walls not likely to collapse onto the equipment?

All overhead eqUipment and lighting appear to be properly secured. 9. Do attached lines have adequate flexibility to avoid damage? . Attached lines use flexible conduit. 10. Based on the above seismic Interaction evaluatIons, is equipment free of potentially adverse seismic Interaction effects? No interaction issues were found. Other Mvama Conditions y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page lof9 Seismic Walkdown Checklist (SVtIC) Status: Y Equipment ID No

.. VOM-FW-2-LCV-106 Equipment Class: !! Equipment

==

Description:==

Turbine*Driven AFW Pump Discharge to Steam Generator level Control Valves ............

_-_ ... _ .. __ . _.. .. ..... -... -.. -.. ' .... _ .........

_.. .. .----_._--

...... _-.. -_ .... __ .-... -...........

_ ... _-..... _---Comment: 3" line reduced to 2" at valve. Valve is braced laterally by a box frame on the valve body. Pipe Is supported about 2' from valve/pipe connection.

Evaluated by' )O( 15/ d-O\d-. SMM Page 2of9 i I Seismic Walkdo1Nl1 Checklist (SVIC) Status: Y Equipment 10 No OC-2 w 04-L030 EquIpment Class: ! Equipment

==

Description:==

Isolation Valve ECV-95 Control Switch Contactor (Supply to Tyrbine-Driyen AFW Location:

Building: Floor EI. 11.§ Room, Area: Manufacturer, modeJ, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i,e. is the Item one of the 50% of SWEL Items requiring such veriflcatlon)?

2, Is the anchorage free of bent. broken, missing or (oose hardware?

All anchor bolts appearto be In good condition.

3. Is the anchorage free of corrosion that is more than mild surface oxidation?

No corrosion Is present. y y Y 4. Is the anchorage free of visible cracks In the concrete near the anchors? Y No visible cracks in the wall behind the panel. 5. Is the anchorage configuration consIstent with plant documentation? (Note: This question only applies If the Item Is Y one of the 50% for whIch an anchorage configuration verifioation Is required.)

(4) 1/2" anchor bofts at each comer mounting the panel to the wall. (6) 1/211 anchor bolts attaching the interior mounting plate to the panel itself. 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seIsmic conditions?

V No issues were Identified.

Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

No soft targets exist, 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

' Block wa/ls In the room are properly restrained.

Lights are rod hung. Overhead distribution systems appear to be properly secured. 9. Do attached lines have adequate flexibility to avoId damage? Attached Jines appear to have adequate flexibility.

10. Based on the above seismic interaction evaluations.

Is equipment free of potentially adverse seismic interaction effects? No seismic Interaction Issues were Identified.

Wher Adverse Conditions y V Y V 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page 1 of 10 Seismic Walkdown Cheddist (SWC) Status: Y Equipment 10 No DC-2-04-LD30 Equipment Class: 1 Equipment

==

Description:==

Isolation Val\!8 FCY-95 Control Switch Contactor (Supply to Turbine-Driven AFW Pump) Comment! Evaluated by" SMM Page 2 of 10 I I

Seismic Walkdown Checklist (SWC) Status: y Equipment 10 No Equipment Class: !l Equipment

==

Description:==

Stop Valve on Supply to Turbine-Driven AfW pump No 1 Location:

Building: Floor EI. 1QQ Room. Area: 2-AEWPl Manufacturer, model. Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the *SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional Is provided at the end of this checklist for documenting other comments.

Anchorage . 1. Is the anchorage configuration verification required (I.e, Is the item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent. broken, missing or loose hardware?

Anchorage to the pipeline appears to be adequate.

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

Anchorage Is free of corrosion that Is more than mild surface oxidation.

4. Is the anchorage free of visible cracks in the conerete near the

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item Is one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations.

is the anchorage free of potentially adverse seismio conditions?

No Issues were Identified.

Interaction Effegts 7. Are soft targets free from Impact by nearby equipment or structures?

Soft targets are free from Impact by nearby equipment and structures.

8. Are overhead equipment, distribution systems. celling tiles, and lighting.

and masonry block walls not likely to collapse onto the equipment?

Valve Is protected overhead by explosion barrier. 9. Do attached lines have adequate flexibility to avoid damage? No flexibility Issues were Identified.

All electrical connections are made with flex conduit. 10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismiC interaction effects? No adverse seismic interaction effects were found. Other Adverse Conditions N y y N/A N/A y y y y y 11. Have you looked for and found no other seismic condlHons that could adversely affect the safety function of the Y equipment?

Page lof 12

Seismic Walkdown Checklist (SWC) Status: Y Equipment 10 No DC-2-04-P-V-MS-2-fCV-152 Equipment Class: .Q Equipment

==

Description:==

Stoo yalve on Supply 10 Turbine-Driven AFW. pump No 1 .-----.-.... -..... _ .........

---... -.........

_ ..... _._---_. .._._-_._--_

.. __ ._ .... --------.. --'" -.-----_ .. _. --_ ... _-_._._. __ ._-_ ..... . Comment: Operator height Is 32" from the center Ifne of the attaching pipe. Pipe Is heavily insulated so the diameter could not be measured.

Pipe has about a 10" diameter with insulation.

Evaluated by: KTM Jla.t§.;.

&/7'; IOi t SMM Page 2of12 j I -I Seismic Walkdown Checklist (SWC) Status: N --------------------------

Equipment fD No Equipment Class: Z Equipment MS Isolation Valves location:

Building:

Pipeway Manufacturer, model, Etc. Instructions for Completing Checklist FloorEI. ill Room. Area: 2-FCV-41 This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL The space below each of the following questions may be used to record the results of judgements and findings.

Additional space is provided at the end of thrs checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (Le. is the item one of the 50% of SWEL items requiring such verification)?

2. Is the anchorage free of bent. broken, missing or loose hardware?

3. Is the anchorage free of corrosion that is mora than mild surface oxidation?

4. (s the anchorage free of visible cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item Is one of the 50% for which an anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

Adjacent valve diaphragm has less than 1/8" olearanoe to steel plates welded to Ihe acluator of FCV -41. Contact is not expeoted to result In failure of 2..f=CV-41.

See Attachment No.1 for dispositlon.

8. Are overhead equipment, distribution systems, ceiling tilas. and lighting.

and masonry block walls not likely to collapse onto the eqUipment?

9. Do attached lines have adequate fleXibility to avoid damage? Conduit has adequate flexibility

10. Based on the above seismic Interaction evaluations. (s eqUipment free of potentially adverse seismic interaction effects? Other Adverse Conditions N N/A N/A NfA NlA -y N y y N 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page 1 of 13 Seismic Walkdown Checklist (S\IVC) Status: N Equipment ID No Equipment Class: 1 Equipment Descf!ption:

MS Isolatign Valves --------------------_._--_

... -_ .. -----------

Comment: 2-FCV-41 is aline mounted valve. No real anchorage.

However;the mounting to the pipe has surfsca corrosion.

See Attachment No.2 for disposition.

Hand wheel for adjacent valve MS has 1/4" clearance to' the acluator flangeln additfon, there is severe corrosion on MS-2-1020.

The proximity of MS-2-1020 is not likely to damage FCV-41 but impact could damage MS 1020.-See Attachment No.3 for disposition.

See Attaohment No. 1 for disposition of the co"osion.

evaluated by" SMM .

kIU/;z-Page 2 of 13 I I Seismic Wa lk down Checklist (SWC) Diablo Canyon Power Plant, Unit Equipment No. DC-2-04-P-VOA-MS-2-FCV-41 ( Attachment 1, Page 1 o. Licensing Basis Evaluation . Issue: The gap between the edge of the air operator on valve no. MS-2-FCV-25 and th.e support for the limit switch on valve no. MS-2-FCV-41 is approximately 1/8". This gap may not be sufficient to accommodate the differential seismic displacement between the valve operator and the limit switch support. Evaluation:

l3ased on a of the strength/stiffness of the limit switch support and the air operator.

it is judged that the potential impact would result in local denting of the air operator.

without impairing its ability to periorm the required fUnction.

Limit switch support should be modified to provide sufficient clearance for differential seismic displacements.

Notification Required:

Yes (50513337)

Evaluated by: __ _O ___ -____ q..:-J '--=..8....l-) _1'-=-____ _ Reviewed by: ______ #;';...f-L--='2-;........ ------(

Seismic Walkdown Checklist (SWC) . Diablo Canyon Power Plant, Unit Equipment No. DC-2-04-P-VOA-MS-2-FCV-41 Licensing Basis Evaluation Issue: Attachment 6, Page 1 O. Surface corrosion was noted at the connection between valve no. MS-2-FCV-41 and the associated main steam piping. Evaluation:

Based on a review of the extent of corrosion, the current condition is not sufficiently severe to impact the ability of the valve to perform its design function (retaining pressure boundary of the piping system) or aJlow the valve to fail during an earthquake in such a way that it could impact SISIP targets in the* vicinity.

Therefore, this condition does not impact the operation of DCPP. The piping and valve body should be cleaned and painted. Notification Required:

Yes (50514671)

Seismic Walkdown Checklist (SWC) Diablo Canyon Power Plant, Unit.£ Equipment No. DC-2-04-P-VOA-MS-2-FCV-41 Page 1 of 1 Licensing Basis Evaluation Issue: The gap between the handwheel on valve no. MS-2-1020 and the actuator on valve no. MS-2-FCV-41 is approximately 114". This gap may not be sufficient to accommodate the differential seismic displacement between the handwheel and the actuator.

In addition, there is severe corrosion on the yoke, bonnet, ancJ packing on valve no. MS-2-1020.

Evaluation:

Based on a comparison of the strength/stiffness of the handwheel and the valve actuator, it isjudged that the potential impact would I at worst, result in local damage to the handwheel , without impairing the pressure boundary of valve no. MS-2-1020 or the ability of valve no. MS-2-FCV-41 to function.

The extent of corrosion on valve no. MS-2-1020 is not sufficient to compromise the structural integrity of the valve at thi$ time. Valve no. MS-2-1020 should be replaced and the orientation of the stem/handwheel should be modified to provide sufficient clearance from the actuator on MS-2-FCV-41.

Notification Required:

Yes (50513374 for gap and 50513511 for corrosion)

Evaluated by: ___ ___

________ _ Reviewed by: _f--lc;bI:..",;"W--:;'-I-

'

_________

_

Seismic WalkdollUl1 Checklist (SWC) Status: Y Equipment ID No OC:'2-04-P-VOA-MS-2-PCV-20 Equipment Class: Z Equipment

==

Description:==

MS power Operated Relief Valves (10% Dump) Location:

Building: FloorEI. 1M Room. Area: 2-PCV-20 Manufacturer.

model, Etc. Instructions for Completing Checklist This checklist may be-used to document the results of the Seismic Walkdown of an item of eqUipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required {I.e. is the item one of the 50% of SWEL Items requiring such verlficatton}?

2. Is the anchorage free of bent. broken, missing or toose hardware?

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

4. Is the anchorage free of visible cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the ftem Is one of the 50% for which an anchorage configuration verification is required.)

6. Based on the above anchorage evaluations.

Is the anchorage free of potentially adVerse seismic conditions?

Interaction Effects _ 7. Are soft targets free from Impact by nearby eqUipment or structures?

Tubing and gages are potential soft targets. However there afe no credJble interaction sources. 8. Are overhead equipment.

distribution systems, ceiling tiles, and lighting.

and masonry block walls not likely to collapse onto the equipment?

The conduit In the area Is well supported.

The shed roof overhead provides some protection.

No masonry walls. 9. Do attached lines have adequate flexibility to avoid damage? The attached tubIng and conduit have adequate flexibility.

10. Based on the above seismic interaction evaluations)

Is equipment free of potentially adverse seismic Interaction effects? Other Adverse Conditions N N/A N/A N/A N/A y y Y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page lof6 Seismic Walkdo\M1 Checklist (SWC) Status:. Y Equipment 10 No DC-2-04-P-VOA-MS-2-PCV-20 EquIpment Class: Z Equipment

==

Description:==

MS Power Operated Relief Valves (10% Dump) Comment: MS-2-PCV-20 is line mounted. Therefore, it has no real anchorage.

There is some mInor surface corros/on on the valve yoke and bolts. No issues. Evaluated by' DKN(f)" .

SMM Page 2 of 6 Seismic Walkdown Checklist (SWC) Status: Y Equipment 10 No DC-2-04-P-YOM-MS-2-FCV-37 Equipment Class: Jl Equipment

==

Description:==

Isolation Valyes 00 SYQpJy to Turbine-priven AFW Pump Location:

Building: EloorE!. ill Room. Area: 2-fCY-37 Manufacturer.

model, Etc. Llmitorgue (SMB size-gO) Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of Judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (Le, Is the Item one of the 50% of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, miSSing or loose hardware?

All attaching bolts are present. 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

Valve body and anchor bolts appear to have surface corrosfon.

Corrosion has already been Identified In tag no. 50289378.

Judged to be ok. 4. Is the anchorage free of visible cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Nole: This quesUon only applies If the item Is one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

No issues were identified.

Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

No credible sources to impact soft targets. 8. Are overhead equipment.

distribution systems, celling tiles, and lighting, and masonry block walls not Hkely to collapse onto the equipment?

OVerhead grating would prevent overhead equipment from collapsing on the valve. 9. Do attached lines have adequate flexibility to avoid damage? Attached lines use flexible conduit. 10. Based on the above seismic interaction evaluations, Is equipment free of potentially adverse seismiC interaction effects? No seismic interaction Issues were found. other Adverse Conditions N Y Y N/A NlA Y Y Y Y Y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page lof14 Seismic WalkdolNl1 Checklist (SWC) Status: y Equipment 10 No OC-2-04-P-VOM-MS-2-FCV-37 Equipment Class: 1l Equipment Descriptio*n:

IsolaUon Valyas on Supply to Turbine-Driven AfW pump Comment: Attaching pipe is Insulated and could not be measured.

Pipe is supported vertically and laterally (perpendicular to the length of the pipe) about l' from the valve connection.

Evaluated by: KIM SMM Page 2of14 Seismic watkdown Checklist (SVVC) Status: Y Equipment 10 No DC-2-04 M P-VRMMS-2-RV-13 Equipment Class: Z Equipment

==

Description:==

MS Safety Valves location:

Building:

Aws.iHm:l!

AoorEI. .MQ Room, Area: Manufacturer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEl. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space is provided at the end of this checklist for documenting other comments.

Anchorage . 1. Is the anchorage configuration verification required (i.e, Is the Item one of the 500/: of SWEL items requiring such verification)? . 2. Is the anchorage free of bent. broken. missing or loose hardware?

All attaching bolts are present. 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Surface corrosion is visible on the anchorage.

Judged to be ok. 4. Is the anchorage free of visible cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is one of the 50% for which an anchorage configuration verifloatlon Is required.)

6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

No Issues were Idenllfied.

'nteractlon Effects 7. Are soft targets free from impact by nearby eqUipment or struotures?

Overhead security grating protects the soft targets on the valve. Gratfng Itself is adequately supported.

8. Are overhead eqUipment.

distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

Nothing is likely to collapse on the eqUipment.

9. Do attached lines have adequate flexibility to avoid damage? Attached line uses a flexible conduit. 10. Based on the above seismic Interaction evaluations, Is eqUipment free of potentially adverse seismic interaction effects? No Issues were Identified.

Qther Adverse Conditions

11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the equipment?

N y y NfA N/A y y y y y y Page lof7 Seismic W8lkdo""" Checklist (SVVC) Status: Y Equipment 10 No OC-2-04-P-VR-MS-2-RV-13 Equipment Class: Z Equipment

==

Description:==

MS Safety Valves Comment: Evaluated by: SMM Page 2 of 7 Seismic WalkdolNll Checklist (S\I\IC) Status: Y Equipment 10 No DC-2-Q4-P-VR-MS-2

.. RV-3 Equipment Class: Z Equipment DescrIption:

MS SafetY Valves Location:

Building: FloorEI. 11Q Room, Area:

Manufacturer.

model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of thIs checklist for documenting other comments.

Anchorage

1. (s the anchorage configuration verification required (I.e. Is the Item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent. broken. missing or loose hardware?

3. Is the anchorage free of corrosion that Is more than mild surface ox1datlon?

4. Is the anchorage free of visible cracks in the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item Is one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

Interaction Effects 7. Are soft targets free from Impact by nearby eqUipment or structures?

No credible Interaction sources. 8. Are overhead equipment.

distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equIpment?

Structural steel framing is rugged. Shed roof overhead provides protect/on

9. Do attached lines have adequate flexibility to avoid damage? Attached tubing has adequate flexibility

10. Based on the above setsmlc Interaction evaluations, is equipment free of potentially adverse seismic Interaction effects? Other Adyerse Conditions N N/A N/A NIA N/A y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page 1 of 5 Seismic WalkdollVll Checklist (SVVC) Status: y ------------------------------

Equipment 10 No Equipment Class: Z Equipment

==

Description:==

MS Safety Valves Comment: The valve Is line mounted. Therefore, no anchorage.

Inlet pipe Is 6" OuUet pipe Is 10" Evaluated by:

M / 'ZAWL Page 2 of 5

, I Seismic walkdollUl1 Checklist (SWC) Status: Y Equipment to No DC-2-04-P-VR-MS-2-RV-61 Equipment Class: Z Equipment

==

Description:==

MS Safety Valves Location:

Building: Floor EI. .tlQ Room, Area: 2-RV-13 Manufacturer.

model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the SeIsmic Walkdown of an item of equipment on the SWEL. The space bf.;llaweach of the following questions may be used to record the results of Judgements and findings.

Additional space is provided at the end af this checklist for documenting other comments.

Ancborage

1. Is the anchorage configuration verification required (Le. is the Item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent. broken. missing or loose hardware?

All attaching baIts are present. 3. Is tha anchorage free of corrosion that Is more than mild surface oxIdation?

Vel}' minor corrosion Is seen on the valve. Judged to be ok. N y y 4. Is the anchorage frae of visible Cracks In the concrete near the anchors? N/A 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item Is N/A one of the 50% for which an anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seIsmic conditions?

y No Issues were Identified.

Interaction Effects 7. Are soft targets free from impact by nearby eqUipment or structures?

Overhead security grating protects the soft targets on the valve. Grating Itself is adequately supported.

8. Are overhead eqUipment.

distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

Nothfng is likely to collapse on the equipment.

9. Do attached lines have adequate flexibility to avoid damage? Attached line uses a flexible conduit. 10. Based on the above seismic Interaction evaluations, is eqUipment free of potentially adverse seismiC Interaction effects? No Issues were Identified.

Qther Adyerse Cood)t)ons y y y y 11. Have you too ked for and found no other seismic conditions that could adversely affect the safety function of the Y equIpment?

Page 1 of8 seismic Walkdovvn Checklist (SWC) Status: Y Equipment 10 No PC-2-04-P-VR-MS-2-RV-61 Equipment

==

Description:==

MS Safety Valves Comment: Evaluated by' SMM Equipment Class: 1 Page 2of8 Seismic Walkdovun Checklist (SWC) Status: Y

Equipment 10 No OC-2-04-P-VR-MS-2-RV-8 Equipment Class: 1 Equipment

==

Description:==

MS Safety Ya!ye§ LocatIon:

Building: Floor EI. "ill Room, Area: 2-pCY-20 Manufacturer, model, Etc.

.. "' ... -.. _-Instructions for Completing Checklist This checklist may be used to document the results of the SeIsmic Walkdown of an Item of equIpment on the SWEL. The .space below each of the followIng questions may be used to record the results of Judgements and findings.

Additional space Is provided at the end of thIs checklist for documenting other comments. . Anchorage

1. Is the anchorage configuration verificatIon requIred (I.e. Is the Item one of the 50% of SWElltems requiring such verification)?

2. Is the anchorage free of bent. broken, mIssing or loose hardware?

3. Is the anchorage free of corrosIon that Is more than mild surface oxidation?

4. Is the anchorage free of visible cracks In the concrete near the anchors? 5. Is the anchorage configUration consistent with plant documentation? (Note: This question only applies If the "em Is one afthe 50% for which an anchorage configuration Is required.)

6. Based on the above anchorage evaluations, Is the anchoraQe free of potentially adverse seIsmIc condillons?

Interaction e{fects 7. Are soft targets free from impact by nearby equipment or structures?

Only the drain line'tubing Is a potential soft target. Howeve; there are no credible Interaction sources. 8. Are overhead equIpment, distribution systems, ceiling tiles, and Iightlng.

and masonry "lock walls not likely to collapse onto the equIpment?

Overhead steel framing Is rugged. No other potential interaction sources. 9. Do attached lines have adeqUate flexibility to avoid damage? Attached tubing has adequate flexibility

10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seismIc Interaction effects? Other Adyerse Conditions N N/A NfA N/A N/A y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page 10f6 Seismic Walkdo\l\ll1 Checklist (S\NC) Status: Y Equipment 10 No PC-2-04-P-V8-MS-2-RV-B Equipment Class: 1 Equipment

==

Description:==

MS SafetY Valves Comment: The valve Is line mounted. Therefore.

It has no anchorage.

Some surface corrosIon on the valve body and pipe flange. No significant Issues. Evaluated by: Page 2of6 Seismic W8lkdolNn Chedclist (SWC) Status: Y -------------------------------

Equipment 10 No OC-2.Qa .. (-T .. U-102 Equipment Class: j! Equipment

==

Description:==

Boric Acid Storage Tank No 1 level Transmitter

.-,. __ . __ .,.". --_ .... _ ... _--_.-.. _.---..... --_._-_.-Location.:

Bunding: FloorEI. lli Room. Area: 2*LT-102 Manufacturer, model. Etc. Rosemount Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Watkdown of an item of equipment on the SWEl. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space is provided at the end of this checklist.for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i.e. is the item one of the 60% of SWEL items requiring such N verification)?

Transmitter has a flange with (4) bolts thl;!t ;s mounted to a pipe flange that Is part of a valvelpipe run welded to the tank. Y 2. Is the anchorage free of bent, broken, missIng or loose hardware?

3. Is the anchorage free of corrosion that is more than mOd surface oxidation?

4. Is the anchorage free of visible cracks In the concrete near the anchOrs? 6. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 60% for which an anchorage configuration verification is required.)

6.

on the above anchorage evaluations.

is the anchorage free of potentially adverse seismic conditions?

Interaction Ef.fecg 7. Are soft targets free from impact by nearby eq!Jipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry bJock walls not likely to collapse onto the equipment?

9. 00 attached lines have adequate flexibility to avoid damage? 10. Based on the above seismfc Interaction evaluations, is equipment free of potentially adverse seismic interaction effects? Other Adverse ConditIons

11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the equipment?

A coiled cable was hung on transmitter that was removed. y N/A N/A y y Y y y y Page lof8 Seismic W8lkdown Checklist (SWC) Status: y Equipment 10 No DC-2-0B-I-I-lI

.. 102 Equipment Class: Equipment

==

Description:==

Boric Acid Storage Tank NQ 1 level Transmitter comment: Eyaluated by: Page 20fg Seismic Walkdovvn Checklist (SWC) Status: Y Equipment 10 No 1 Equipment Class: 21 Equipment

==

Description:==

Seal Water Heat Exchanger Location:

Building: Floor EI. 85 Room. Area: 2-SWHEl Manufacturer, model. Etc. Atlas lodust(jal Instructions for Completing Checklist This checklist may be used to document the results of the Seismlo Walkdown of an item of equIpment on the SWEL. The space below each oflhe following questions may be used to record the results of Judgements and findings.

Additional space is provided at the end of this checklist for documenting other comments.

Anchorage

1. 15 the anchorage configuration verification required (i.e, is the Item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of benl, broken, missing or loose hardware?

Afl anchorage Is present and In good condition.

S. Is the anchorage free of corrosion that Is more than mild surface oxidation?

No corrosion is present on the anchorage.

4. Is the anchorage free of visible cracks In the conorete near the anchors? No visible cracks In the concrete.

y y y y 5. Is the anchorage configuration consistent with plant documentatfon? (Note: This question only applies if the item Is Y one ofthe 50% for which an anchorage configuration verification is required.)

(4) 314" anchor bolts (2 on each side of the heat exchanger).

One end of the heat exchanger Is single nutted and the opposite end Is double nutted where the slolted holes are. 6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

Y No issues were Identified.

Interaction Effe<;ts 7. Are soft targets free from Impact by nearby equipment or structures?

No credible sources can Impact soft targets. 8. Are overhead equipment, dIstribution" systems, celling tUes, and IIght1ng.

and masonry block walls not likely to collapse onto the equipment?

Nothing is likely to collapse on the equipment.

9. Do attached lines have adequate flexibility to avoid damage? All attached lines appear to have adequate flexibJllty.

10. Based on the above seismic Interaction evaluations, Is equIpment free of potentially adverse seismIc Interaction effects? No seismic interaction issues were Identified.

Qtber Adverse Conditions Y y Y y 11. Have you looked for and found no other seIsmic conditions that could adversely affect the safety function of the Y equipment?

Page 1 of 11 Seismc Walkdo\lVl1 Checklist (SVtfC) Status: y ---------------------------------------------------------------------------

Equipment ID No PC--2-0B-M-HX-SWHE1 Equipment Class: 21 Equipment

==

Description:==

Seal Water Heat Exchanger Comment: Evaluated by' KTM 10//51 o.oi SMM Page 20fll Seismic walkdollVlt Checklist (SWC) Status: Y Equipment 10 No DC-2-08-M-PP-CCP1 Equipment Class: Equipment

==

Description:==

Centrifugal Charging pump NQ 1 Location:

Building: FloorEI. 1.3 Room. Area: 2-CCP1 Manufacturer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEl. The space belo"" each of the following questions may be used to record the results of Judgements and findings.

Additional space Is provlded at the end of this checklist for documenting other comments.

Anchorage 1.18 the configuration verification required (I.e, Is the item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

All anchorage Is In good condition.

3. Is the anchorage free of corrosion that is more than mild surface oxidation?

All anchor bolts are coated and no corrosion Is present. 4. Is the anchorage free of visible cracks In the concrete near the anchors? No visible cracks were seen. Grout overflow or coatings repair on north side noted; however not a structurallssue.

5. Is the anchorage configuration conSistent with plant documentation?

This question only applies If the Item is one of the 50% for which an anchorage configuration verification is required.) . (16) 1" anchor bolts. 6 on each side ofthe pump and 2 on each end. See drawing 439519 for details. 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

No adverse seismic conditions were seen for the anchorage.

Interaction Effects 7. Are soft targets free from Impact by nearby eqUipment or stfUctures?

No sources were Identified that could Impact soft targets. a. Are overhead equipment.

distribution systems. ceiling tiles, and lighting.

and masonry block walls not likely to collapse onto the eqUipment?

Overhead HVAC dueling and lights were adequately restrained.

9.00 attaChed lines have adequate flexibility to avoid damage? All attached lines appear to have adequate flexibility.

10. Based on the above seismic interaction evaluations, Is equipment free of potentially adverse seismic interaction effects? No Interaction effects to note. other Niverse Conditions y y y y y Y Y y Y y . 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

No;ssues.

Page 10f15

-j Seismic WalkdollVl1 Checklist (S\I\IC) Status: Equipment 10 No DQ..2-0B-M-PP-CCPl Equipment Class: .Q Equipment

==

Description:==

Centrifugal Charging Pump No. 1 (Emergency)

... _--_ .. _ .. -.. -_._-_._---_._

..... _-.. _ ....... _..... _ .. _-_. __ ... _----------------_

.. ' .... -.. -.. Comment: Includes subcomponent DC-2-08-M-PP-AP1.

Yellow substance appeared to be leaking from a flexible conduit attached to the pump. The leak had previously been Identified and maintenance arrived during the walkdown to clean up the apparent oil. Eyaluated by: KTM __ ... ___ .__

SMM y ----Page 2 of 15 Seismic WalkdollVl1 Cheddist (SVVC) Status: Y --------------------------------------

Equipment to No DC-2-08-M-PP-CCP3 Equipment Class: g Equipment

==

Description:==

Centrifugal Charging pump No. Worma!) . . -----" .' _ .. -----...... _._--_._-_.----

Location; Building: FloorE!. :u Room, Area: Manufacturer, model, Etc. Instructions for Completing Cheokllst This checklIst may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Ancborage

1. Is the anchorage configuration verification required (i.e, Is the Item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

All 12 anchor bolls are present and securely fastened.

3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Anchors are coated and no corrosion Is present. 4. Is the anchorage free of visible cracks In the concrete near the anchors? No cracks were Identified.

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item Is one of the 50% for which an anchorage configuration verification Is required.)

(12) 718"anchor bolts on the skid attaching to the concrete pedestal.

6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

No Issues were Identified.

Interaotion Effeqts 7. Are soft targets free from Impact by nearby equipment or structures?

No credible sources to Impact soft targets on the pump. 8. Are overhead equipment, distribution systems, ceiling tiles. and lighting, and masonry block walls not likely to collapse onto the equipment?

OVerhead monorail has 8 support on the ceiling that is missing a rod that connects the monorail to the support. Another support with a rod attached is adjacent to the support with the missing rod. The adjacent support with the rod attached was found to be an upgraded design and the original support was left abandoned In place. 9. Do attached lines have adequate flexibility to avoid damage? Altached lines use flexIble conduit. 10. Based on the above seIsmic Interaction evaluations, Is equipment free of potentially adverse seismic interaction effects? No interaction effects to note. Other Adyerse Conditions.

Y Y y y y Y Y Y y Y 11. Have you looked for and found no other seismIc condltfons that could adversery affect the safety function of the Y equipment?

A substance seems to be leaking from the pump. A notification had already been written. Page lof8 Seismic Walkdo\Nl1 Checklist (SVVC) Status! Y ---Equipment 10 No QC-2-Q8-M-PP-CCP3 Equipment Class: .5 Equipment

==

Description:==

Centrifugal Charging E'ump No !NQrmal) Comment: Evaluated by; to/ 15/

SMM Page 2of8 Seismic Walkdown Checklist (SWC) Equipment ID No. DC-2-08-P-P-LINE-1119 Equipment Class 12 o. (Other) Equipment

==

Description:==

SFP Fill Piping from Hold-up Tank Recirculation Pumps Location:

Bldg. Auxiliary Floor El. 140' Room, Area Unit 2 Fuell-landling At'ea Sheet i of2 Status: Manufacturer, Model, Etc. (optional but recommended)

=nI:...=a=--

_____________________

_ Instructions for Completing Checldist This checklist may be llsed to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of the checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (Le., is the item one of the 50% ofSWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, anchorage is not applicable.

3. Is the anchorage free of corrosion that is more than mild surface corrosion?

4. Is the anchorage free of visible cracks in the concrete near the anchorage?

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which anchorage configuration verification is required.)

6. Based 011 the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects N N/A N/A N/A N/A N/A 7. Are soft targets free from impact by nearby equipment or structures?

NI A This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, seismic interaction effects are not applicable.

8. Are overhead equipment, distribution systems, ceiJing tiles and lighting, and masomy block walls not N/A likely to collapse onto the equipment?

9, Do attached lines have adequate flexibility to avoid damage? NI A to. 'Based on the above seismic interaction evaluations, is the equipment free of potentially adverse seismic interaction effects? 12 Enter the equipment class name fl.-om Appendix B: Classes of Equipment NIA Seismic Walkdown Checklist (SWC) Equipment JD No. DC-2-08-P-P-LlNE-1119 Equipment Class l2 O. (Other) Equipment

==

Description:==

SFP Fill Piping from Hold-up Tank Recirculation Pumps Other Advel'se Conditions

11. Have you looked for and fOlind no other seismic conditions that could adversely affect the safety function of the plant equipment?

This SWC applies to potential SFP i"apid drain-down through a pipe entering the SFP. Therefore, safety functions are not applicable. Comments (Additional pages may be added as necessary)

Sheet 2 of2 Status: N/A This SWC applies to potential SFP rapid drain-down through the fill piping which enters the fuel transfer canal area of the SFP. Drawing no. 500936 specifies that a 112" diameter anti-siphon hole be provided in the pipe at e]ev. 136'-3". An underwater video camera was used to inspect the submerged pipe. Visual observation ofthe camera's image on a monitor verified the presence of the hole and its approximate elevation (just below the girth weld between the vertical section of the pipe and the elbow). Since the hole is located significantly more tban ] 0' above the spent fuel assemblies stored in the SFP (approx. elevation 122'), rapid drain-down of the SFP inventory through this pipe is not possible.

Evaluated by: WRH Date: 10/04/2012 DRe 10104/2012 12 Enter the equipment class name from Appendix B: Classes of Equipment

( Seismic Walkdo\lUl1 Checklist (SWC) Status! y -----_ ... _----Equipment 10 No OQ..2-08-P-VOA-CVCS-2-FCV-110A Equipment Class: 1 Equipment

==

Description:==

Boric Acid Blender Inlet valve Location:

Building: FloorEI. 1QQ Room, Area: 2-lCVl12B Manufacturer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the' Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments . . Anchorage . 1. Is the anchorage configuration verification required (I.e, Is the item one of the 50% of SWElltems requiring such

2. Is the anchorage free of bent, broken, missing or loose hardware?

No broken, bent, or mIssing hardware.

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

Only some minor surface corrosion on pJpe support anchors and base plates 4. Is the anchorage free of visible cracks In the concrete near the anchors? No cracks observed "near the pipe support anchors. N y y y 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item Is N/A one of the 60% for which an anchorage configuration verification Is required.) " 6. Based on the above anchorage evaluations.

Is the anchorage free of potentially adverse seismic conditions?

Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

The only potanUal soft targets are the air lines. However there are no credible Interaction sources 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting.

and masonry block walls not likely to collapse onto the equipment?

Conduit and piping are well supported.

Duct Is braced. Lights have safety chains. 9. Do attached lines have adequate flexibility to avoid damage? Attached airlines have adequate slack. 10. Based on the above seismic Interaction evaluations.

is equipment free of potentially adverse seismic interaction effects? Other Adverse Conditions

11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the equipment?

y y y y y y Page lof9 Seismic Walkdo",," Checklist (SVVC) Status: y --------------------------

Equipment 10 No DC-2-08-P-YOA-CVCS-2-FCV-110A Equipment Class: 1 Equipment Descrlpilon:

Bode Acid Blender Inlet valve Comment: Valve 2-FCV-110A Is a line mounted cylindrically shaped AOV, The pipe Is well supported adjacent to the valve, This valve Is in the same room as valves 2-LCV-112B and 2-8104. Evaluated by' DKN ** SMM Page 2 of9 Seismic Walkdo1Nl1 Checklist (SVVC) Status: v ---------------------------------------

Equipment 10 No

.. VOM-CVCS .. 2-8104 Equipment Class: a Equipment DescripUon:

Emergency Borale Valve to Charging Pump Location:

Building: Floor EI. jjlQ Room, Area: 2*LCV112B Manufacturer, model, Etc. Umitorgye aotyator InstructIons for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each 'of the following questfons may be used to record the results of judgements and findIngs.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification reqlJlred (I.e, Is the Item one of the 50% of SWEL items requiring such verification)?

2. 15 the anchorage free of bent, broken, missing or loose hardware?

No bent, broken or missing hardware 3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

No significant corrosion observed.

4. Is the anchorage free of visible cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

Operator has a cylindrical plastic cover piece. However, there are no credible interaction sources. 8. Are overhead equipment.

distribution systems, ceiling tiles. and lighting, and masonry block walls not likely to collapse onto the equipment?

... Conduit and pipe are well supported.

Overhead lighting Is restrained by a safety chaIn. No masonry walls. 9. Do attached lines have adequate flexibility to avoid damage? Piping Is very well supported adjacent to the valve. 10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seismic Ihteractlon effects? Other Adverse Condltlons

11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the equipment?

N y y y N/A y y y y y y Page 1 of 11 /

seismic Wallulo",," Checklist (SWC) Status: Y -------------------------

Equipment 10 No DC-2-Q8-P-VOM-CVCS-2-B104 Equipment Class: a Equipment

==

Description:==

Emergency Borate Valve to Charging Pymp Comment: The valve operator is braced In the NS direct/on by a steel strut that is anchored to a concrete wall. The strut Is anchored to the wall by 4-112 Inch Hilt; HDI shell anchors. The valve yoke is restrained In the EW direction by a field fabricated steel strut that Is connected to the adjacent pipe support. The pipe support Is vel}' rugged and Is fabricated from 5x3 tube steel. The support is anchored to the concrete floor with 4 -1 Inch Hiltl Kwik Bolts. Evaluated by; Page 2 of 11 Seismic Walkdown Checklist (SVVC) Status: Y .... _-----------'-----------...,.------

Equipment 10 No pC-2-0a*p-VOM-CVCS-2-LCY-112B Equipment Class: 11 Equipment

==

Description:==

Volulme Control Tank Outlet to Centrifugal Charging pump Suction ValVes Location:

Building: FloorEI. 1QQ Room, Area: 2-LCVl12B Manufacturer, model, Etc. Anchor valve company. limltorQue actuator Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space beloweaoh of the following questions may be used to record the results of Judgements and findings.

Additional space Is provided at . the end of this checklist for documenting other comments.

AnchQrage

1. Is the anchorage configuratfon verlfioatlon required (I.e. Is the Item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

The valve Is line-mounted and has no anchorage.

No bent, broken, or missIng hardware In the valve mounting.

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

No significant corrosion.

N N/A N/A 4. Is the anchorage free of visible cracks In the concrete near the anchors? N/A 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is N/A one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

y Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

No credible Interaction sources. 8. Are. overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

Conduit Is well supported.

Overhead lighting has a safety chain restraint.

HVAC duct Is braced. No masonry wal/s. 9. Do attached lines have adequate flexibility to avoid damage? Attached cables have adequate slack. The pipe is well supporled adjacent to the valve. 10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seismic Interaction effects? No credible Interaction sources, other Adverse Conditions y Y y Y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equIpment?

Page lof7 Seismic Walkdown Checklist (SVVC) Status: Y ----------------------

Equipment ID No DC-2-0a-p-YOM-CYCS-2-lCY*112B Equipment Class: .a Equipment

==

Description:==

Volu;me Control Tank Outlet to Centrifugal Charging Pump Suction Valves Comment: Z-LCV-112B Is aline mounted valve with no other supports for the vafve yoke. Eyaluated by: Page 2of7

! Seismic WalkdollUll Checklist (SWC) Status: Y Equipment 10 No DC-2-09-M-PP-SIP1 Equipment Class: Equipment

==

Description:==

SI Pump No. 1 Location:

Building: FfoorEI. M Room. Area: .2::.Slf.1 Manufacturer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space is provided at the end of this checklist for documenting other comments.

Anchoraae

1. Is the anchorage configuration verification required (I.e. Is the item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent, broken. missing or loose hardware?

All anchOrage appears to be In good condition.

3. Is the anchorage free of corrosIon that is more than mild surface oxidation?

No corrosIon Is present. 4. Is the anchorage (ree of visible cracks In the concrete near the anchors? No visible cracks In the concrete.

y y y y 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is Y one of the 50% for which an anchorage configuration verification (s required.)

(10) 5/8" anchor bOlts are consistent with plant documentation.

See drawing 443481 for deta/ls. 6. Based on the above anchorage evaluations, is the anchorage free of potentially adVerse seismic conditions?

Y No adverse anchorage conditions seen. Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

No credible sources to Impact soft targets on pump. 8. Are overhead equipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equIpment?

No block walls In the area. Lighting Is ball and socket type to allow movement.

HVAC duct anchorage adequate.

9. Do attached lines have adequate to avoid damage? All attached lines have adequate flexibility.

10. Based on the above seIsmic interaction evaluations, Is equipment free of potentially adverse seismic Interaction effects? No seismic Interaction issues to note. Other Adverse Coodltlons y y y y 11 . Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment? . No Issues. Page 1 of 12 Seismic Walkdovun Checklist (SWC) Status: Y Equipment 10 No EquIpment Class: .§ Equipment

==

Description:==

SI Pump No.1 Comment: KTM 0a1fh Evaluated by: SMM Page 2 of 12

I Seismic Walkdovvn Checklist (SWC) Status: Y Equipment 10 No Equipment Class: .a Equipment

==

Description:==

RWST to Charging Pump Suction Valves Location:

Building: FloorEI. M Room, Area: 2-FCV-365 Manufacturer.

model, Etc. Llmltorgue (D-L2QO) Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space is provided at the end of this checklist for documenting other comments. . Anchorage

1. Is the anchorage configuration verification required (i.e, Is the Item one of the 50% of SWEL Items requiring such verification)

? 2. Is the anchorage free of bent, broken, missing or loose hardware?

All attaohlng bolls are In good condition.

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

No corrosion Is present. N y y 4. Is the anchorage free of visible cracks In the concrete near the anchors? N/A 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item Is N/A one of the 50% for which an anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, 1s the anchorage free of potentially adverse seismic conditions?

8 t' pipe Is rigidly restrained wIth wall mounted plate near the MOV and pipe Interface.

No struts or attachments to valve body. Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

No credible sources could Impact soft on the valve. 8. Are overhead equIpment.

distribution systems. ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

No overhead equipment

/s likely to col/apse on the valve. No ceiling tiles or block walls In the area. Wall mounted bulb fighting Is adequately supported and will not affect valve. 9. Do attached lines have adequate flexibility to avoid damage? All attached lines have adequate flexibility.

10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic interaction effects? No Issues were Identified.

Valve wheelis about 1 II from the wall. Judged to be adequate cfearance due to the rigid anchorage near the valve-piping Interface.

Qther Adyerse Condltl0Ds; y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety functron of the Y equipment?

Page 10f 11 Seismic Walkdown Checklist (SWC) Status: y ---------------------------,---------------

Equipment 10 No DC-2-09-P-VOM-Sl-2-880SA Equipment Class: a Equipment

==

Description:==

RWST to ChargIng pump Suction Valves ; , Comment: 37" from operator to 8" pipe. Evalyated by: Joll G/ J.e>\d-. SMM

-Page 20f11 Seismic Walkdovun Checklist (SWC) Status: Y -----------------------------------

Equipment 10 No DC-2-Q9-P-VOM-SI-2-8923A Equipment Class: a Equipment

==

Description:==

81 Pump SuctIon Valyes from RWST Location:

Building: FloorEI. M Room, Area: Manufacturer, model, Etc. Umjtorgue 5MB (size-OO)

Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at . thaend of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i.e. Is the item one of the 50% of SWEL Items requiring such verification)?

2. [s the anchorage free of bent, broken, missing or loose hardware?

All attachment bolts appear to be In good condition.

3. Is the anchorage free of corrosion that is more than mild surface oxidation?

No corrosfon Is present. 4. Is the anchorage free of visible cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item Is one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluattons, Is the anchorage free of potentially adverse seismic conditions?

No adverse anchorage conditions were identified.

Interaction Effects 7. Are soft targets from Impact by nearby equipment or structures?

No sources were Identified that could Impact soft targets. 8. Are overhead eqUipment.

distribution systems, ceiling tiles. and lighting, and masonry block walls not likely to collapse onto the equipment?

No eqUipment is likely to Impact the valve. 9. Do attached lines have adequate flexibility to avoid damage? Attached lines appear to have adequate flexibility.

10. Based on the above seismic Interaction evaluations, is equipment free of potentially adverse seismic Interaction effects? No se/smfc interaction effects to note. Other Adyerse Conditions N y y N/A N/A y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

No issues. Page 1 of 10 Seismic Walkdown Checklist (SWC) . Status: Y Equipment 10 No OC-2-09-P-VOM-SI-2-8923A Equipment Class: .a Equipment

==

Description:==

SI Pymp Suction Valves' from RWST Comment: 32 Inch distance from middle of operator to piping. 6" pipe diameter.

Evaluated by: Page 2 of 10 Seismic Checklist y

Equipment 10 No PC-2-1Q-M-HX-RHIi;1 Equipment

2.1 Equipment

Desoription:

RHR Heat Exchanger No.1 Location:

8uUdfng: FioprEI. 1.3 Ro.o.m. Area: 2::.BI:iE.1 model. Etc. (nstructions for CompletIng Checklist ThIs checJdlst may be used to dooument the reSUlts of the SelsmIo of an. item of equipment on th.e SWEL The space each of t{'le following qU$stlons may be. used to record tna results' of Judgements and .findIngs.

Addrtlonal space Is provided at the end of thiS.*

fpr dp*c4mentlng other comments; .

1.. Is th$ anchorage configuration ve.rificatlon required (i.e. Is the Ilem one of the 50% qf items requiring such verification)?

2. Is the of bent, broken, missing or loose hardware?

Anchf?rage Is "In (food condilloil.

3. Is the anchoraQe free of corrosion that Is more than mnd slirface oxidation?

No (Jorro.sio.n is

4. Is the anchorage free of visible cracks In the 9()r'lQrete anchors? Nb .vIsible cracks In the concrete.

5. Is the ai'l.chora*g$

configuration cOl1sistent with plant (Note:

question only applies If the Itern Is one 'of 1he 59% for whiQh an anchorage*

confi.9uratioh verification Is required.)

(4) 1-114;1 bolts at the base horlzonia}

r.estroi'l)ts at both the top and bottom .of the heat exchanger Bra I.n. . . . ... .... __ ...... -.. Based on the above Is the free .of potentiai!y adverse seIsmic conditions?

'nteraptlon Effects 7. Are s9ft targets from Impact by nearby equlp.t1ient or structures?

The *only.soft is a valve at the lop of the heat but there no for Interaction.

a. Are .overhead equipme,nt, systems, ceiling tile&, and lighting.

and masonry blppk walls not likely to oollapse onto the . . NQ OVerhead eql.!ipment t d;stribut;on systems, .cellfng tiles, or Itghtlng .exists In the room. The room does not have I)IQ.ck . , 9. po attached l!nes .have adequate to avofd in.

9h the aoove seIsmIc mracUon evaluatlons, Is equipment free of po*tenti?'lIy effects? No potentially adverse seJsmlc Interact/on Other f'dygrse COnditions

'y y y y y y y y y y 11.

ybulooke..a.

for*and fOl,Jnd n9 other seismic conditionS that could adverse'ly affect th.e safety tuncli.on of the Y equipment?

Page 1 of16

....

Walkdown (SWC) Status: .-.. --.-.-..

y Equ[pme.nt ID No DG-2-10-M-H.X-RHE1 Equipment

==

Description:==

.RHR Hepi No, 1 C.113SS: 21 . ..,...,.....-"':-----:.

-. -'*"7---'*-

. __ .-.. """ -' .. '-,"'T" .* -.......

..... _ .........

_ .. ' .** , **. _-*. _

..... , '.' Comment: Evaluated by: to I ;l;).../

CUll Page 2of.16 Seismic walkdown Checklist (SWC) Status: Y Equipment ID No pC .. 2 .. 10-M-PP-RHRP2 Equipment Class: § Equipment

==

Description:==

RHR pump No.2 -----.-.. ----_ .*.. _------_ .. _.

..... ------...... -.. ----.--... -------... -...... -.. -.-.. _---_. location:

Building: FloorEI. §Q Manufacturer.

model. Etc. Westinghouse VSW1 ----_ .. _----------_ .. __ ..... -_._---"-:--------

Instructions for Completing Checklist ThIs checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchprage

1. Is the anchorage conflguratlon verification required (i.e, Is the Item one of the 50% of SWEL Items requirIng such verification)?

2. Is the anchorage free of bent. broken. missing or loose hardware?

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

4. Is the anchorage free of visible cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item Is one of1he 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations.

Is the anchorage free of potentially adverse seismic conditIons?

Pump has dead load sliding support -sliding on embedded plate on grout pad. Motor Is braced with two snubbers.

Snubbers conneoted to frames that are anchored to the floor and adjacent wall. Snubber support frame anchoraga matches Drawing No 051401 Sheets 23 and 24. Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

8. Are overhead equipment.

distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

9. Do attached Jines have adequate flexibility to avoid damage? COW cooling line to seal water cooler has a flexible fitting but the fixed segment Is close to the snubber attachment bracket on the motor. Gap between bracket and water line is about 112/1. Judged acceptable since snubbers are expected to restrain bracket motion during seismic event. 10. Based on the above setsmlc Interaction evaluations, Is equipment free of potentially adverse seismic Interaction effects? Other Adverse Conditions v y y v v v y y y y 11. Have you looked for and found no other seismic condIUons that could adversely affect the safety function of the Y equipment?

Page 1 of 15 Seismic Walkdoll\ll1 Checklist (SWC) Status: Y --------------------------------

Equipment 10 No DC-2-10-M-PP-RHRP2 Equipment Class: § Equipment

==

Description:==

RHR pump No.2 Comment: Pump and base concealed by Insulation.

Evaluated by' Page 2 of 15 Seismic Walkdo\Nl1 Checklist (SWC) Status: y Equipment 10 No PC-2-10-P-VOM-RHR-2-8700A Equipment Class: I! Equipment

==

Description:==

RHR pump Suction Valves Location:

Building: FloorEI. za Room, Area: Manufacturer.

model. Etc. lImitornue 5MB-Q Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the follOwing questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

AnchOrage

1. Is the anchorage conflguration verification required (i.e. is the Item one of the 50% of SWEL Ilems requiring such verification)?

2. Is the anchorage free of bent, broken. miSSing or loose hardware?

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

4. Is 1he anchorage free of vIsible cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above "anchorage evaluations.

Is the anchorage free of potentially adverse seismic conditions?

No issues were identified.

Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

No nearby equipment or structures that can impact the soft targets. 8. Are overhead eqUipment.

distribution systems, ceiling tiles, and lighting.

and masonry block walls not likety to collapse onto the equipment?

All overhead conduit lines are securely attached to the ceiling. 9. bo attached fines have adequate flexibility to avoid damage? Flexible conduit runs into the valve. 10. Based on the above seismic Interaotion evaluatlons.ls eqUipment free of potentially adverse seismic Interaction effects? . No seismic Interaction Issues. Other Adverse Conditions N NlA NfA N/A NIA y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page 1 of8 Seismic Walkdown Checklist (SWC) Status: Y Equipment 10 No DC-2-10-P-VOM-RHR-2-8700A Equipment Class: Ii Equipment

==

Description:==

RHR pump Suction Valves ........ _.,.. ... ......... , .*...*.. _ ..... _._ .. __ -'. . __ ...*.*.*.*.

., ........... ._ .. __ ._._. __

_____ ........ __ ... __ ._ I; Comment: Motor operator Is 57" horizontal from center line of pipe. 141i pipe diameter.

KTM Evaluated by' SMM Page2ofS'

!.

Seismic WalkdollVll Checklist (SVVC) Status: Y ------------------------------

Equipment 10 No Equipment Class: a Equipment

==

Description:==

RHR Pump RecIrculatjon Valves location:

Building: Manufacturer, model. Etc. Limjtorgue Instructions for Completing Checklist FloorEI. Room, Area: 2-ECY-641A This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (I.e, Is the Item one of the 50% of SWEl items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

No broken, bent or missing hardware.

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

No corrosion observed 4. Is the anchorage free of visible cracks In the concrete near the anchors? The valve Is line mounted with no other restraInt N y y N/A 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is N/A one of the 50% for which an anchorage configuration verification Is reqUired.)

6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

y Interaction Effects 7. Are soft targets free from Impact by nearby eqUipment or structures?

The only potential soft targets are the plastic cylinder over the position Indicator and the csbles. However there are no credible Interaction sources. 8. Are overhead eqUipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

Duct and pIpe are well supported.

The lights are conduit hung with bal/and socket connections st the ceIling. No Issues. 9. Do attached lines have adequate flexibility to avoid damage? Power cables have adequate slack 10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seismic Interaction effects? . Other Adverse CondItions y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

No other concerns Page lofl0 Seismic Walkdo\lVl1 Checklist (SVVC) Status: y Equipment ID No DC-2-10-P-VOM-RHR-2-ECY-641A Equipment Class: .a Equipment

==

Description:==

RHR pump Recirculation Valves Comment: Evaluated by' Page 2 of 10 Seismic Walkdown Checklist (SVVC) Status: Y EquIpment 10 No 0Q.2*10-p-VOM-RHR-2-ECV*641B Equipment Class: .a Equipment

==

Description:==

RHR pumo Recirculation Valves Location:

Building: FloorEI. Room, Area: 2-RHRP2 Manufacturer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the resulls of the SeIsmic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

AdditIonal space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i,e, Is the item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

4. Is the anchorage free of visIble cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is one of the 50% for which an anchorage conflguratfon verification is required.)

6. Based on the above anchorage evaluations.

Is the anchorage free of potentially adverse seIsmic conditions?

Interaction Effects 7. Are soft targets free from Impact by nearby eqUipment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles, and fighting, and masonry block walls not likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage? 10. Based on the above seIsmic Interaction evaluations, Is equipment free of potentially adverse seismic Interactfon effects? Other klVatse Conditions N y y N/A NIA y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page 1 of2 Seismic WalkdolM1 Checklist (SWC) Status: Y 10 No DC-2-10-P-VOM-RHR-2-FCV-641B Equipment Class: Equipment

==

Description:==

RHR pump Recirculation Valyes Comment: No seIsmic concerns. Evaluated by:

s3 . Page 2 of 2

\ Seismic WalkdolMl Checklist (SWC) Status: y ______________

- _._ *** uo ***** _ ****** _ *** ____________

_ ___________

_ Equipment 10 No DC-2-13-!-I-TJ-653 EquIpment Class: jj! Equipment

==

Description:==

SEPC Temperature Instrumentation Location:

Building: Floor EI. .100 Room, Area: 2*SFPHE1 Manufacturer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equIpment on the SWEL. The space below each of the following questIons may be used to record the'results of Judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification requIred (I.e, Is the Item one of the 50% of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken. missing or loose hardware?

TI-653Is a small line mounted Instrument.

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

No corrosion was observed where the instrument Is mounted to the pipe. 4. Is the an9horage free of visible cracks In the concrete near the anchors? 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item Is one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations.

is the anchorage free of potentially adverse seismic conditions?

Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

No credible Interaction sources. 8. Are overhead equipment, distribution systems, ceiling tiles. and lighting, and masonry block walls not likely to collapse onto the equipment?

HVAC duct Is braced. Pipe and conduit are well braced. No masonry walls. The adjacent shielding door Is top restrained.

Lighting Is conduit hung pendant lights. 9. Do attached lines have adequate flexibility to avoid damage? The pipe Itself Is well supported.

10. Based on the above seismic Interaction evaluations, Is eqUipment free of potentrally adverse seIsmic Interaction effects? Other Adverse Conditions N N/A N/A N/A NlA y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the* Y equipment?

Page lof6 Seismic Walkdown Checklist (SWC) Status: Y Equipment 10 No OC-2-13-I-I-TI-653 Equipment Class: 19 Equipment

==

Description:==

SFPC Temperature Instrumentation Comment: Evaluated by:

___ l c I \ 1( ( 2-IfJ/'1/Wr6 Page 2of6 Seismic WalkdoVtll1 Checklist (SWC) Status: Y Equipment ID No DC-2-13-M-HX-SEPHE1 Equipment

==

Description:==

Spent Fuel Pool Heal Exchanger Location:

Building: Manufacturer, modeJ, Etc. Instructions for Completing Checklist AoorEI . .1QQ Equipment Class: 21 Room, Area:

This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

AdditIonal space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i.e, rs the item one of the 50% of SWEL [tems requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

No corrosion observed.

4. Is the anchorage free of visible cracks in the concrete near the anchors? No crac/(s observed near the

5. Is the anchorage configuration consistent with plant documentation? (Note: This questfon only applies if the Item Is one of the 60% for which an anchorage configuration verification Is required.)

Cons;stent with drawing 433222 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects 7. Are soft targets free from Impact by nearby equIpment or structures?

8. Are overhead equipment, distribution systems, ceiling tiles, and lighting.

and masonry block walls not likely to collapse onto the equipment?

HVAC duct Is braced. Pipe and conduit are well braced. No masonry walls. Lights are conduit hung pendant lights. Werning light and PA speaker are supported.

9. Do attached lines have adequate flexibility to avoid damage? The attached piping Is supported near heat exchanger.

10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seismic Interaction effects? The adjacent shielding door Is top restrained.

Other Adyerse Conditions y y y y y y y y y y 11. Have you looked for and found no other seIsmic conditions that could adversely affect the safety function of the Y equipment?

Page lof8 i .: Seismic Walkdown Checklist (SWC) Equipment ID No DC-2-13-M-HX-SEPHE1 Equipment Class: Equipment

==

Description:==

Spent Fuel Pool Heat Exchanger Comment: The heat exchanger Is supported by two steel saddles. Each saddle Is anchored to a concrete pier with 4

7/8 inch bolls. The bottom of each bolt is welded to an embedded steel plate anchored In the EI. 100 ft concrete floor. One support permits sliding In the long direction.

Evaluated by'

.. A ' 1\/\ J t> Il 1/ 'to/ 't ,0/,,1 ZfJll... y Page 2 of8 Seismic Walkdo\M1 Cheddist (SWC) Status: Y ,---------------------------------

Equipment 10 No DC ..

Equipment Class: § Equipment

==

Description:==

Soent Fuel pool pumps Location:

Building: Floor EI. 1m! Room. Area: 2*SFPP1 Manufacturer.

model. Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (I.e, Is the Item one of the 50% of SWEL Items requiring such verification)?

2. Is the anchorage free of bent, broken. missIng or loose hardware?

No bent, broken, or mISSing hardware.

3. Is the anchorage free of corrosion that Is more than mild surface oxidation?

No significant corrosion observed 4. Is the anchorage free of visible cracks In the concrete near the anchors? No cracks observed near the anchors. y y y y 6. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is Y one ofthe 50% for which an anchorage configuration verification Is required.)

The anchorage Is consistent with drawing 443222 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Y Interaction Effects 7. Are soft targets free from Impact by nearby eqUipment or structures?

Potential soft targets Include the glass ollievelizer and stainless steel tubing. However, no credible interaction sources. 8. Are overhead equipment.

distribution systems, ceiling tiles, and lighting.

and masonry block walls not likely to collapse onto the equipment?

HVAC duct is braced. Pipe and conduit are well supported.

No masonry walls. Overhead crane rail Is braced. 9. Do attached lines have adequate flexibility to avoid damage? The attached pipes are well supported near the pump and power cables have flexible attachment.

10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seismic Interaction effects? Other Adyerse Conditions y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equIpment?

Page 1 of 10 Seismic Walkdown Checklist (SWC) Status: Y .----------------------------------

Equipment 10 No Equipment Class: § Equipment

==

Description:==

Spent Fuel pOQI Pumps Comment: The pump and motor are mounted to a common steel skid. The skid is anchored 10 the concrete floor by 6 " 112 Inch bolts. The bolts are welded to steel insert plates In the floor. A 6 Inch concrete pad Is placed between the EI. 100 floor and the pump skid. The anchor bolts are cast In the pad. Evalyated by: .em. _ ,I 4{I11 t 1.. 10/11/lb/'G Page 2 ofl0 Seismic Walkdown Checklist (SWC) Equipment ID No. DC-2-13-P-P-LINE-1080 Equipment Class 12 O. (Other) Equipment

==

Description:==

Suction Piping from SFP Skimmer Location:

Bldg. Auxiliary Floor El. 140' Room, Area Unit 2 Fuel Handling Area Sheet 1 of3 Status:

Model, Etc. (optional but recommended)

=n1c.:::a=--

_____________________

_ Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions maybe used to record the results of judgments and findings, Additional space is provided at the end of the checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i.e., is the item one of the 50% ofSWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, anchorage is not applicable.

3. Is the anchorage free of corrosion that is more than mnd surface corrosion?

4. Is the anchorage fi'ee of visible cracks in the concrete near the anchorage?

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects N N/A N/A N/A N/A N/A 7. Are soft targets free from impact by nearby equipment or structures?

Nt A This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, seismic interaction effects are not applicable.

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not NI A likely to coUapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage? NIA 10. Based on the above seismic interaction evaluations, is the equipment free ofpotential1y adverse N/A seismic interaction effects? 12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment IO No. DC-2-13-P-P-LINE-1080 Equipment Class 12 O. COther) Equipment

==

Description:==

Suction Piping SFP Skimmer Other Adverse Conditions

11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the plantequipment?

This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, safety functions are not applicable. . Comments (Additional pages may be added as necessmy)

Sheet 2 of3 Status: N/A This SWC applies to potential SFP rapfd drain-down through the suction piping for one the SFP skimmers, which exits the SFP on its west side. The skimmer is maintained even with the surface ofthe SFP inventory and includes a short length of flexible hose to petmit the elevation to be adjusted (see drawing no. 500943). Drawing no. 500943 indicates that the centerline of this pipe is at elevation 138'-6". Visual inspection verified that the pipe exits the wall of the SFP at app'rox. elevation 138' (see photo on sheet 3 for typical configuration) and that the length of the flexible hose. is not sufficient to allow the skimmer to sink more than several feet into the SFP. Since the lowest possible elevation that could be reached by the skimmer inside the SFP is located significantly more than 10' above the spent fuel assemblies stored in the SFP (approx*. elevation 122'), rapid drain-down of the SFP inventory through this pipe is not possible.

Evaluated by: 10/04/2012 10/04/2012 12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment ID No. DC-2-13-P-PwLINE w lI18 Class 12 o. (Other) Equipment

==

Description:==

Suction Piping from SFP Skimmer Location:

Bldg. AuxilialY Floor EI. 140' ROOIn, Area Unit 2 Fuel Handling Area Sheet t" of3 Status:

_____________________

_ Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end ofthe checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i.e., is the item one of the 50% ofSWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

This SWC applies to potential SFP rapid drain-down through a pjpe entering the SFP. Therefore, anchorage is not applicable.

3. Is the anchorage free of corrosion that is more than mild surface cOlTosion?

4. Is the anchorage free of visible cracks in the concrete near the anchorage?

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies ifthe item is one of the 50% for which anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects N N/A NJA NJA N/A N/A 7. Are soft targets free from impact by nearby equipment or structures?

NI A This SWC applies to potentia1 SFP rapid drain-down through a pipe entering the SFP. Therefore, seismic interaction effects are not applicable.

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls nQt NI A . likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage? N/A 10. Based on the above seismic interaction evaluations, is the equipment free of potentially adverse NIA seismic interaction effects? 12 Enter the equipment class name fi'om Appendix B: Classes of Equipment I

Seismic Walkdown Checklist (SWC) Equipment ID No. DC-2-13-P-P

-LINE ,; 1118 Equipment Class 1 2 O. COther) Equiplnent

==

Description:==

Suction Piping from SFP Skimmer Othei' Adverse Conditions

11. Have ypu looked for and found no other seismic conditions that could adversely affect the safety function of the plant equipment?

This SWC applies to potential SFP rapid drain-down through a pipe entedng the SFP. Therefore, safety functions are not applicable. Cominents (Additional pages may be added as necessary)

Sheet 2 of3 Status: N/A This SWC applies to potential SFP rapid drain-down through tlle suction piping for one of the SFP skimmers, which exits the SFP on its west side. The skimmer is maintained even with the surface of the SFP inventory and includes a shott length of flexible hose to permit the skimmer elevation to be adjusted (see drawing no. 500943). Drawing no. 500943 indicates that the centerline of this pipe is at elevation 138'-6". Visual inspection verified that the pipe exits the wall of the SFP at appi'ox. elevation 138' (see photo on sheet 3 for typical configuration) that the length of the flexible hose is not sufficient to allow the skimmer to sink more than several feet into the SFP. Since the lowest possible elevation that could be reached by the skimmer inside the SFP is located significantly more than 10' above the spent fuel assemblies stored in the SFP (approx. elevation 122'), rapid drain-down of the SFP inventory through this pipe is not possible.

Evaluated by: 10/04/2012 10/04/2012 12Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment 10 No.

Equipment Class 12 O. (Other) Equipment

==

Description:==

Retu11l Piping from SFP Skimmer Location:

Bldg. Auxiliary Floor E1. 140' Room, Area Unit 2 Fuel Handling Area Sheet 1 of2 Status: _Y_ Manufacturer, Model, Etc. (optional but recommended)

=nJ:..:;:a'--

_____________________

_ Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of the checklist for documenting other comments.

Ancborage

1. Is the anchorage configuration verification reqUITed (i.e.) is the item one of the 50% of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, anchorage is not applicable.

3. Is the anchorage free of corrosion that is more than mild surface corrosion?

4. Is the anchorage free of visible cracks in the concrete near the anchorage?

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies ifthe item is one of the 50% for which anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects N N/A N/A. N/A N/A N/A 7. Are soft targets free from impact by nearby equipment or structures?

N/A This *SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, seismic interaction effects are not applicable.

8. Are overhead equipment, distribution systems, ceiling tiles and Jighting, and masonry block walls not N/A likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage?* N/A 10. Based on the above seismic interaction evaluations, is the equipment fi'ee of potentially adverse Nt A seismic interaction effects? 12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment IO No. DC-2-13-P-P-LINE-l121 Equipment Class 12 O. COther) Equipment

==

Description:==

Return Piping from SFP SIdminer Othel' Adverse Conditions

11. Have you looked for and found no other seismic conditions that could adyersely

, affect safety function of the plant equipment?

This SWC applies to potential SFP rapid drain-down , through a pipe entering the SFP. Therefore, safety functions are not applicable.

Commeilts (Additioilal pages may be added as nece$sary)

Sheet 2 of2 Status: N/A This SWC applies to potential SFPrapid dram-down tlu'ougb one of the three return pipes for theSFP skimmers, which entets the SFP on its east Drawing no. 500936 indicates that the centerline of this pipe i$ at elevation 137'-6". Visual inspection verified that the pipe enters the wall of the at apprgx. elevation 138'. Since the elevation of this pipe is located significantly more than 10' abOve the spent fuel assemblies stored in the SFP (approx. elevation 122'), rapid drain-down of the SFP inventory tlu'ough this pipe is not possible.

Evaluated by: 10104/2012 10/04/2012 12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment ID No. Equipment

==

Description:==

Return Piping from SFP Skimmer Location:

Bldg. Auxiliary Floor EI. ..:..14-,-,0,,-'

__ _ Equipment Class 12 O. (Other) Room, Area Unit 2 Fuel Handling Area Sheet 1 of2 Status: Manufacturer, Model, Etc. (optional but recommended)

=nJ:..;::a:.....-

_____________________

_ Instructions for Completing Checldist This checklist may be used to document the results of the Sejsmic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of the checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i.e., is the item one of tile 50% of SWEL items requiring such verification)?

2. Is the anchorage fi'ee of bent, broken, missing or loose hardware?

This SWC applies to SFP rapid drain-down through a pipe entering the SFP. Therefore, anchorage is not applicable.

3. Is the anchorage fi'ee of corrosion that is more than mild surface co11'osion?

4. Is the anchorage fi'ee of visible cracks in the concrete near the anchorage?

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects N N/A N/A N/A NIA . N/A 7. Are soft targets free from impact by nearby equipment or structures?

NI A This SWC applies to potential SFP rapid drain-down through a pipe entering SFP. Therefore, seismic interaction effects are not applicable.

8. Are overhead equipment, distribution systems, ceiling tiles. and lighting, and masomy block walls not NI A likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage? N/A 10. Based on the above seismic interaction evaluations, is the equipment free of potentially adverse N/A seismic interaction effects? 12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment ID No. DC-2-13-P-P-LINE-1122 Equipmen t Class 12 o. COther) Equipment

==

Description:==

Return Piping {i'om SFP Skimmer Other Adverse Conditions

11. Have you looked for and found no other seismic conditions that c0\11d adversely affect the safety function of the plant equipment?

This SWC applies to potential SFP rapid drain-down tlu'ough a pipee.ntering the. SFP. Therefore, safety functions are not applicable. Cominents (Additional pages may be added as necessary)

Sheet 2 of2 Sta t us: N/A This SWC applies to potential SFP rapid drain-down through one of the three retufn pipes fOf the SFP skimmers, which enters the SFP on its east side. Drawing no. 500936 i n dicates that the centerline of this pipe is at Clevation 137'-6". Visual inspection verified thatthe pipe enters the wall ofthe SFP at approx. elevation 138'. Since the elevation dfthis pipe is located significantly more than 10' above the spent fuel assemblies stored in the SFP (approx. elevation 122'), rapid dl'aiil-down of the SFP inventory through this pipe is not possible.

Evahlated by: WRH Date: 10104/2012 DRC 10/04/2012 Ii Euter the equipment class name fi'om Appendix 13: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment ID No. Equipment

==

Description:==

Return Piping for SFP Skimmer Location; Bldg. Auxiliary Floor EI. -,,-14-,-,0,,-'

__ _ Equipment Class 12 0. (Other) Room, Area Unit 2 Fuel HandUng Area Sheet 1 of2 Status: Manufacturer, Model, Etc. (optionaJ but recommended)

.:,:n/;:,.:a=--

_____________________

_ Instructions for Completing Checklist This checklist may be used to document the results ofthe Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be to record the results of judgments and findings.

Additional space is. provided at the end of the checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (Le., is the item one ofthe 50% of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

This SWC applies to potential SFP rapid drainMdown through a pipe entering the SFP. Therefore, anchorage is not applicable.

3. Is the anchorage free of con'osion that is more than mild surface corrosion?

4. Is the anchorage fi'ee of visible cracks in the concrete near the anchorage?

5. Is the anchorage configuration consistent with plant documentation? (Note; This question only applies if the item is one of the 50% for which anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects N N/A N/A N/A N/A N/A 7. Are soft targets free from impact by nearby equipment or structures?

Nt A This SWC applies to potential SFP rapid drainMdown through a pipe entering the SFP. Therefore, seismic interaction effects are not applicable.

8. Are overhead equipment, distribution systems) ceiling tiles and lighting, and masonry block walls not NI A likely to collapse onto the equipment?

9. Do attached Jines have adequate flexibility to avoid damage? N/A 10. Based on the above seismic interaction evaluations, is the equipment free of potentially adverse N/A seismic interaction effects? 12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment ID No. DC-2-] 3-P-P-LINE-1123 Equipment Class 12 O. (Other) Equipment

==

Description:==

Return Piping for SFP Skimmer Other Adverse Conditions

11. I-lave you looked for and found no other seismic conditions that could adversely affect the safety function of the plant equipment?

This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, safety functions are not applicable. Comments (Additional pages may be added as necessary)

Sheet i of2 Status: N/A This SWCapplies to potential SFP rapid drain-down through one of the three rehlrll pjpes for the. SFP which enters the SFP on its east side. Drawing no. 500936 indicates that the centerline of this pipe is at elevation 137'-6". Visual inspection verified that the pipe etHers the wall of the SFP at approx. elevation 138'. Since the elevation of this pipe is located significantly more than 10' above the spent fuel assemblies stored in the SFP (approx. elevation 122'), rapid drain-down of the SFP inventory through this pipe is not possible.

Evaluated by: WRH Date: 10/04/2012 DRC 10/0412012 12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment ID No. Equipment Class 12 O. (Other) Equipment

==

Description:==

Suction Piping to SFP Heat Exchangers Location:

Bldg. Auxiliary Floor E1. ...:...14..:...:::0,--'

__ Room, Area Unit 2 Fuel Handling Area Manufacturer, Model, Etc. (optional but reconunended)

Il1silllctions for Completing Checklist Sheet 10f4 Status: This checklist may be used to document the results ofthe Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of the checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (Le., is the item one of the 50% ofSWEL items requiring such verification)?

2. Is the anchorage fiee of bent, broken, missing or loose hardware?

This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, anchorage is not applicable.

3. Is the anchorage free of corrosion that is more than mild surface corrosion?

4. Is the anchorage fi'ee of visible cracks in the concrete near the anchorage?

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects N N/A N/A N/A N/A N/A 7. Are soft targets free from impact by nearby equipment or stlUctures?

N/A This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, seismic interaction effects not applicable.

8. Are overhead equipment, *distribution systems, ceiling tiles and lighting, and masonry block walls not NI A likely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage? N/A 10. Based on the above seismic interaction evaluations, is the equipment free ofpotentialIy adverse N/A seismic interaction effects?

12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment ID No. DC-2-13-P*P-LINE-154 Equipment Class 12 o. COther) Equipment

==

Description:==

Suction Piping to SFP Heat Exchangers Other Adverse Conditions

11. l:lave you looked for and found no other seismic conditions that could adversely affect the safety function of the plant equipment?

This SWC applies to potential SfP rapid drain-down throllgh a pipe entering the SFP. Therefore, safety functions al'e 110t applicable.

Comments (Additional pages may be added as necessary)

Sheet 2 of4 Status: _Y_ N/A This SWC applies to potential SFP rapid drain-down through the suction piping to the SFP heat exchangers, Wl1ich exits the SFP near its north-west comer. The .inlet to t1le pipe is through a screen/strainer mounted flush with the surface of the west wall of the SFP. Drawing -no. 500936 indicates that the centerline oftilis pipe is at elevation 134'. Visual inspection verified that the pipe exits the wall of the SFP from the Cask Washdown Area at approx. elevation 134 1 (see photo on sheet 3) and that the screen/strainer doesnot extend significantly below the water level in the SFP. Since the termination of the pipe inside the SFP is located significantly more than 10' above the spent fueJ assemblies stored in the SFP (approx. elevation 122'), rapid drain-down of the SFP inventory through this pipe is not possible.

Evaluated by: 10/0412012 10/04/2012 12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment ID No. DC-2-13-P-P-LINE-159 Equipment Class 12 o. (Other) Equipment

==

Description:==

Return Piping fi'om SFP Heat Exchangers Location:

Bldg. Auxiliary Floor El. 140' Room, Area Unit 2 Fuel Handling Area Sheet I of2 Status: Manufacturer, Model, Etc. (optional but recommended) n1=-=a'--____________________

_ Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgments and findings.

Additional space is provided at the end of the checklist for documenting other comments.

Anc110rage

1. Is the anchorage configuration veIification required (i.e., is the item one of the 50% ofSWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP .. Therefore, anchorage is not applicable.

3. Is the anchorage fi'ee of corrosion that is more than mild surface COlTOl?ion?

4. Is the anchorage free of visible cracks in the concrete near the anchorage?

5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which anchorage configuration verification is required.)

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects N N/A N/A N/A N/A N/A 7. Are soft targets free :fl:om impact by nearby equipment or structures?

N/A This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP. Therefore, seismic interaction effects are not applicable.

8. Are overhead equipment, distribution systems, ceiling tiles and lighting, and masonry block walls not NI A 1ikely to collapse onto the equipment?

9. Do attached lines have adequate flexibility to avoid damage? N/A 10. Based on the above seismic interaction evaluations, is the equipment free of potentially adverse N/A seismic interaction effects? 12 Enter the equipment class name from Appendix B: Classes of Equipment Seismic Walkdown Checklist (SWC) Equipment TO No. DC-2-13-P-P-LlNE-159 Equipment Class 1 2 o. (Other) Equipment

==

Description:==

Retum Piping fi'om SFP Heat Exchangers Other Advet'se Conditions

11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the plant equipment?

This SWC applies to potential SFP rapid drain-down through a pipe entering the SFP , Therefore, safety functions are not applicable. Comments (Additiomll pages may be ad4ed as nec;essary)

Sheet 2 of2 Status: N/A This SWC applies to po t ential SFP rapid drain-down through the return piping from the SFP heat exchangers, which enters the SFP near its south-east comer, D r awing no. 500936 specifies that a 112" diameter anti-siphon hole be provided in the pipe at elev. 136'-3". An underwater video camerCi was used to inspect the submerged pipe. Visual observatioIi of the camera's image on a monitor verified the presence of the. hole and its approx.imate elevation (just below the gu1h weld between the vertical section of the pipe and the elbow). Since the hole is located significantly more than 10' above the spent fuel assemblies stored in the SFP (approx. elevation 122'), rapid drain-down of the SFP inventory through this pipe is not possible.

Evaluated by: 10104/2012 10104/2012 12 Enter the equipment class name from Appendix B: Classes of Equipment

. ( Seismic WalkdolNl1 Checklist (SVVC) Status: Y ---Equipment 10 No DC-2*13-SFPPTS1 Equipment Class: 1 Equipment

==

Description:==

Spent Fuel pool Pump Transfer Switches Location:

Building: Floor EI. jjlQ Room, Area: Manufacturer, model, Etc. Instructions for Completing Check,list This checklist may be used to document the results of the SeismIc Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of ludgements and findings.

Additional space Is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (J.e, Is the item one of the 60% of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

All anchorage Is present and in good condition.

3. Is the anchorage free of corrosIon that is more than mild surface oxidation?

No corrosion is present. 4. Is the anchorage free of visible cracks In the concrete near the anchors? No cracks In the wall were found near the anchorage.

N y y y 6. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the Item Is N/A one ofthe 50% for which an anchorage configuration verification is required.) . 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

(4) anchor bolls secure the panel to the wall . Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

No credible sources could impact soft targets on the panel. B. Are overhead eqUipment.

distribution systems. ceiling tiles. and lighting.

and masonry block walls not likely to collapse onto the equipment?

Overhead (l18fr/bufion systems and lighting appear to be properly secured. No ceiling tiles or block walls in the area. 9. Do attached lines have adequate flexibility to avoId damage? Attached lines and panel are secured to the wall. '10. Based on the above seismic Interaction evaluations, Is equipment free of potentially adverse seismic interaction effects? No Issues were Identified.

Other Adyerse Conditions y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page 10f9 Seismic Walkdown Checklist (SVtfC) Status: Y Equipment 10 No DC-2-13-SFPPTS1 Equipment Class: 1 Equipment

==

Description:==

Spent fuel Pool pump Transfer Switches Comment: Evalyated by' KTM........-v D.alf};. 10/ , 5/ d() \;)... SMM \ Page 2 of9 Seismic WaIIcdo1lVl1 Checklist (SWC) Status: y ,----------------.----------------------------------------------------

Equipment 10 No DC-2-14-E-p

..

Equipment Class: a Equipment

==

Description:==

CleW Flow Control Valve No ECV-430 (Qew A and B Flow Control Valyes location:

Building:

lYI:f2irm FloarEI. ,ag Room, Area: 2-CCWHE Manufact1.Jrer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space is provided at the end of this checklist for documenting other comments.

Ancborag!

1. Is the anchorage configuration verification required (i.e. fs the item one of the 50% of SWEL Items requiring such N verification)?

Pipe-mounted butterfly valve between flanges. Yoke Is very robust and operator height is 54 J1 (horizontal).

2. Is the anchorage free of bent, broken, missing or loose hardware?

3. Is the anchorage free of corrosion that Is more than mUd surface oxidation?

4. Is the anchorage free of visible cracks in the concrete near the anchors? , 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for which an anchorage configuration verification Is required.)

6. Based on the above anchorage evaluations, is the anchorage of potentially adverse seismic conditions?

Interaction Effects 7. Are soft targets free from Impact by nearby eqUipment or structures?

8. Are overhead eqUipment, cUstribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

OVerhead piping, conduit, and Junction boxes are well restrained.

9. Do attached lines have adequate flexibility to avoid damage? Limited flexibility In electrical line, but It appears to be adequate.

10. Based on the above seismic interaction evaluations, is equipment free of potentially adverse seismic Interaction effects? Q.ther Adverse Condltlons

11. Have you looked for 'and found no other seismic conditions that could adversely affect the safety function of the equipment?

y y N/A N/A y y y y y y Page lof6 Seisnic WalkdolMl Cheddist (SVtIC) Status: Y Equipment 10 No OC .. 2-14-E-P-VOM-CCW-2-FCV-430 Equipment Class: § Equipment Description

CCW Flow Control Varve No FCV-430 (CCW Header A and B Flow Control Valves ----------------Comment: Evaluated by' Page 2 of6 Seismic Walkdovm Cheddist (StIVC) Status: Y Equipment 10 No PC:2-14-I-E

.. TE-6 EqufpmentClass:

1e Equipment

==

Description:==

QQW Heat Exhanger Output Thermocouples

,.".',-"._,.'

..... ,,, .. ,,.',,' ..... , .... -------_._._-------, location:

Building:

IYrI2imt FloorE!. 1m. Room, Area: 2-CCWHE Manufacturer, model, Etc. Instructions for Completing Checklist ThIs checklist may be used to document the results of the Seismic Walkdown of an item of eqUipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space is provIded at the end ofthis checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (I.e, Is the item one of the 50% of SWEL Items requiring such verification)?

The thermocouple Is light In weight and is mounted on th.e CCW shell-side outlet line by a welded coupling and short sections of 1/2" threaded pipe. 2. Is the anchorage free of bent. broken, missing or loose hardware?

3. Is the anchorage free of corrosion that is more than mild surface oxidation?

4. Is the anchorage free of visIble cracks in the concrete near the anchors? 6. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is one of the 50% for Which an anchorage configuration verification is required.)

Consistent with drawing DC

6. Based on the above anchorage evaluations, Is the anchorage free of potentially adverse seismic conditions?

The thermocouple is mounted on the side of the elbow of the shell-side discharge piping. Interaction Effects 7. Are soft targets free from Impact by nearby equipment or structures?

There is about 1/211 clearance between the head 01 the thermocouple and an adjacent railing but the relative movement should be less. 8. Are overhead eqUipment.

distribution systems, celling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

There are two electrical connections to the thermocouple both of which include robber tube sections.

There is limited flexibility in these electrical Jines, but it appears to be adequate.

9. Do attached lines have adequate flexibility to avoid damage? 10. Based on the above seismic Interaction evaluations, is eqUipment free of potentially adverse sefsmic interaction effects? Other Adverse Conditions y y y N/A y y y y y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function ofthe Y equipment?

Page 1 of7 Seismic Walkdo1M1 Cheddist (SWC) Status: Y Equipment to No OC-2-14-I-E-TE-6 Equipment Class: 19 Equipment

==

Description:==

CCW Heat Exhanger Qutput Thermocouples Comment: Evaluated by: Page 2 of7 Seismic Walkdown eddist (SWC) Status: N Equipment to No OC-2-14-M-HX-CCWHE1 Equipment Class: 21 Equipmel1t.Description:

CCW Heat Exchanger No.1 Location:

Building:

Turbine FloorEI. 85 Room, Area: 2-CCWHE Manufacturer, model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional ,space is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (Le, is the item one of the 50% of SWEL items-requiring such Y verification)?

The CCW Heat Exchanger has (2) saddle supports one of which is fixed and the other sliding. The stiffened sliding support has (3) 1-318" bolts located within tbe diameter of the HX. The support is a/so stiffened at the outside and Y is secured by (4) additional 7/8" boltsThe fixed support is similarly ancl10red but has additional axial braces 011 either side that stiffen the fixed support. The baseplate for the axial braces is secured by (10) 1-1/4" kwik-bolt expansion anchors. 2. Is the anchorage free of bent, broken, missing or loose hardware?

3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Y 4. Is the anchorage free of visible cracks in the concrete near the anchors? X N The pedestal supporting the sliding support exhibits some cracking of the concrete on the east edge of the )(..1\ 1\ ll'l, I t.. pedestal.

For disposition see Attachment

1. #IL t'{ 'U)./ n-5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the item is Y one ofthe 50% for which an anchorage configuration verification is required.)

Anchorage is consistent with Hosgri modification drawing 463683-1 and modification As Built drawing DC 6002998-161. 6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

The HX has no soft targets. 8. Are overhead eqUipment, distribution systems, ceiling tiles, and lighting, and masonry block walls not likely to collapse onto the equipment?

There is a reinforced masonry wall near the south end of the HX. However the wall has additional support at tbe bottom and near the top. 9. Do attached lines have adequate flexibility to avoid damage? Tube-side nozzles penetrate via control valves directly through the floor below and are connected by means of flexible joints. The shell-side piping is well supported.

10. Based on the above seismic interaction evaJuations, is equipment free of potentially adverse seismic interaction effects? Y Y Y Y Y Page lof20 f'l Walkdo'iNn Checklist

(§We) , Status: Equipment IP No Equipment Class; E quipmen t

Description:

CCW Heat Exchao ger No, 1 Other Adverse Conditions 11.-Have YQlIlookec\

for and found n6 other seismic c<;>nditions that could adversely C)ffect safety function of the Y equipment?

An electrical cable (wiring at end app e ars to be f!xpo se d) Is laying on fIli i, floor of f{}e pit qefow inlet nozzle (Near valve Tbis may be-a'gio.Unding

'cable. Also an electrioal cable funning to a pOint near the inlet nozzle app ea rs (0 be taut It is 'uncertain as to what these cables are as access is limited sinc e pit is design ale d'a c q ntined space. Fo r-dispqsii(on see. Atlac1un e nt 2. Comment:

by: Page 2 of 20 .J I I j Seismic Walkdown Checklist (SWC) Diablo Canyon Power Plant, Unit Equipment No. DC-2-14-M-HX-CCWHE1 Licensing Basis Evaluation Issue: Attachment 1, Page 1 of 1 The pedestal supporting the sliding support exhibits some cracking of the concrete on the east edge of the pedestal.

Evaluation:

The support on the sliding end includes holes that are slotted in the North-South direction (Ref. drawing 463683). According to the CCW Heat Exchanger foundation evaluation shown in Civil Calculation No. EQP-306.1, the slotteo holes do not provide restraint in the North-South direction, in order to allow for the thermal expansion of heat exchanger.

Therefore, forces are not applied to the concrete pedestal in the North-South direction, so there is no adverse effect on the structural integrity of the pedestal.

Recommendation:

Repair the cracks in the concrete pedestal.

Notification Required:

Yes (50518781)

Evaluated by:

____ t_o..:.-( <-__ _ Reviewed by: _____ 'L J'--__

Seismic Walkdown Checklist (SWC) Diablo Canyon Power Plant, Unit.£ Equipment No. DC-2-14-M-HX-CCWHE1 Attachment Page 1 of 1 Licensing Basis Evaluation Issue: (1) An electrical cable (wiring at end appears to be exposed) is lying on the floor of the pit below the tube-side inlet nozzle (Near valve no. DC-2-17-P-VOA-SW-2-FCV-602).

This may be a grounding cable. (2) An electrical cable rllnning to a point near the tube-side inlet nozzle appears to be taut. It is uncertain as to what these cables are connected as access is limited since the pit is designated a confined space. Evaluation:

The classification or the cables is unknown. Since they are currently undamaged and, based on the location of the cables, displacements assoCiated with a seismic event will not compromise their integrity.

Therefore, these issues do not impact safe operation of DCPP. Recommendation These electrical cables shall be inspected by electrical maintenance group. Notification Requited:

Yes (50519440)

Evaluated by: ... __ '

_______ _ Reviewed by:

__ \')--t-'-I4..£-P 1'-L I-"k:::.....-------

. \. Seismic WalkdoVtll1 Checklist (SVVC) Status: Y Equipment 10 No PC-2-14-M-PP-CCWP1 EquIpment Class: .5 Equipment

==

Description:==

CCW Pump No.1 Location:

Building:

Auxiliary FloorEI. Room. Area: 2-CCWPl Manufacturer, model, Etc. Bingbam Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additlonal space Is provided at the end of this checklist for documenting other comments.

Anchorago

1. Is tbe anchorage configuration verification required (i.e, is the Item one of the 50% of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, missing or loose hardware?

AI/anchorage Is in good condition.

3. Is the anchorage free of corrosion that is more than mild surface oxidation?

No corrosion Is present. y y y 4. Is the anchorage free of visible cracks In 1he concrete near the anchors? Y No visible cracks In the area. 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies if the Item Is Y one of the 50% for which an anchorage configuration verification is required.)

Anchorage Is consistent with plant drawings.

See document 6003029 sheets 99 through 105 for details. 6. Based on the above anchorage evaluations, Is the anchorage free of potentially-adverse seismic condHions?

y No Issues . Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

No credible sources In the area. 8. Are overhead equipment.

distribution systems, ceiling tiles. and lighting, and masonry block walls not likely to collapse onto the equipment?

Overhead light Is chain hung with a second safety chain attached to prevent it from falling. 9. Do attached fines have adequate flexibility to avoid damage? All attached lines have adequate flexibility.

10. Based on the above seismic Interaction evaluations, is equipment free of potentially adverse seismic Interaction effects? No Interaction effects to note. Other Adverse ConditIons y y y Y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment?

Page lof15 Seismic WalkdolNl1 Checklist (SVVC) Status: Y Equipment 10 No Equipment Class: § Equipment

==

Description:==

CCW Pump No.1 ---... _ .... __ .... -...........

__ ._ ... __ ._ ...... _ .. _--_ .. -.. _. . . ---_ .. _--_. __ .... __ .. __ ._-_._---._.

__ ... __ .. _ .*.........

_--_. __ ._--_. '-" Comment: Includes subcomponent DC-2-20-M*PP-CCWAP1.

Evaluated by; KTM SMM Page 2of15 Seismic 'WalkdolNll Checklist (SWC) Status: y Equipment 10 No OC-2-14-M-TK-CCWST1 Equipment Class: 21 Equipment

==

Description:==

CCW Surge Tank Location:

Building:

Auxiliary FloorEI. Manufacturer,.

model, Etc. Instructions for Completing Checklist This checklist may be used to document the results of the Seismic Walkdown of an Item of equipment on the SWEL. The space below each of the following questions may be used to record the results of judgements and findings.

Additional space is provided at the end of this checklist for documenting other comments.

Anchorage

1. Is the anchorage configuration verification required (i.e, is the item one of the 50% of SWEL items requiring such verification)?

2. Is the anchorage free of bent, broken, l)1issing or loose hardware?

The CCW Surge Tank is supported on two stiffened saddle supports that are welded to the tank shell through doubler plates. One of the supports is fixed and the other is a sliding support. The fixed support is anchored to the support pedestal by (6) 1-112/1 embedded bolts and through bolts. The fixed saddle is stiffened axially by structural members that run from the outside base of the support to the vertical center of the tank on either side. The sliding support is anchored by (4) 1-112" through bofts. The view of the anchorage is limited by a skirt that covers the lower half of the tank. Horizontal displacement of the tank is restrained by large structural side restraints located on both sides of the tank and at both ends. These side restraints are anchored to the roof slab and contact the tank at its vertical center. . 3. Is the anchorage free of corrosion that is more than mild surface oxidation?

Surface corrosion on base plates associated with lateral braces on the east and west sides of the CCW Surge Tank. See Attachment 1 for disposition.

4. Is the anchorage free of visible cracks in the concrete near the anchors? y y y 5. Is the anchorage configuration consistent with plant documentation? (Note: This question only applies If the item is N/A one of the 50% for which an anchorage configuration verification Is. required.)

What could be seen of the anchorage Is consistent with drawings 446511-1 and

6. Based on the above anchorage evaluations, is the anchorage free of potentially adverse seismic conditions?

y Interaction Effects 7. Are soft targets free from impact by nearby equipment or structures?

The tank is outside havIng no soft targets. All components located on the West side of the tank are well supported.

8. Are overhead eqUipment, distribution systems, ceiling tiles, and lighting.

and masonry block walls not likely to collapse onto the equipment? . 9. Do attached lines have adequate flexibility to avoid damage? 10. Based on the above seismic interaction evaluations, is eqUipment free of potentially adverse seismic interaction effects? . Other Adverse Conditions y N/A y y 11. Have you looked for and found no other seismic conditions that could adversely affect the safety function of the Y equipment? . I Page 1 of 10 Seismic Walkdown Checklist (SWC) Status: Y Equipment ID No DC-2-14-M-TK:-CCWST1 Eqqfpment 21 Equipment Descrlptlon:QCW Surge Tank Comment: Evaluated by' .

Page 2 of 10 I I I Ii I' i I .

@@ Line 2: / Line 2: @@
 | number = ML12333A270
 | issue date = 11/27/2012
-| title = Diablo Canyon, Unit 2, Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.3 Seismic Unit 2, Part 1 of 3
+| title = Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.3 Seismic Unit 2, Part 1 of 3
 | author name = Halpin E D
 | author affiliation = Pacific Gas &amp; Electric Co
@@ Line 15: / Line 15: @@
 | page count = 142
 | project =
-| stage = RAI
+| stage = Response to RAI
 }}
 =Text=
 {{#Wiki_filter:Pacific Gas and Electric Company November 27,2012 PG&E Letter DCL-12-119 u.s. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852 Docket No. 50-323, OL-DPR-82 Diablo Canyon Power Plant Unit 2 Edward D. Halpin Senior Vice President Nuclear Generation
-& Chief Nuclear Officer Diablo Canyon Power Plant Mail Code 104/6 P. O. Box 56 Avila Beach, CA 93424 805.545.4100 E*Mail: E1H8@pge.com 10 CFR 50.54(f) Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.3 Seismic Unit 2
+& Chief Nuclear Officer Diablo Canyon Power Plant Mail Code 104/6 P. O. Box 56 Avila Beach, CA 93424 805.545.4100 E*Mail: E1H8@pge.com 10 CFR 50.54(f) Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation
+===2.3 Seismic===
+Unit 2
 ==References:==
@@ Line 27: / Line 30: @@
 m Document Control Desk November 27, 2012 I & Page 2 PG&E Letter DCL-12-119 Enclosure 3 of Reference 1 states that within 180 days of the NRC's endorsement of the walkdown process, each addressee will submit its final response for the requested information.
 Enclosure 3 of Reference 1 also stated that the response should include a list of any areas that are unable to be inspected due to inaccessibility and a for when the walkdown will be completed.
-Enclosure 1 of this letter provides PG&E's response to Recommendation 2.3 Seismic for DCPP Unit 2 accessible components.
+Enclosure 1 of this letter provides PG&E's response to Recommendation
+===2.3 Seismic===
+for DCPP Unit 2 accessible components.
 PG&E will submit an updated response after inspection of currently inaccessible items. PG&E is making regulatory commitments (as defined by NEI 99-04) in Enclosure 2 of this letter. This letter includes no revisions to existing regulatory commitments.
 If you have any questions, or require additional information, please contact Mr. Terence L. Grebel at (805) 545-4160.
@@ Line 37: / Line 43: @@
 * San Onofre
 * South Texas Project
-* Wolf Creek Response to Recommendation 2.3 Seismic Diablo Canyon Power Plant Unit 2 Enclosure 1 PG&E DCL-12-119 Page 1 of 15 Acronyms used in this response are defined in Attachment L to this enclosure.
+* Wolf Creek Response to Recommendation
+===2.3 Seismic===
+Diablo Canyon Power Plant Unit 2 Enclosure 1 PG&E DCL-12-119 Page 1 of 15 Acronyms used in this response are defined in Attachment L to this enclosure.
 ==
@@ Line 48: / Line 57: @@
 The seismic inputs applicable to the design of DCPP are described in the DCPP UFSAR, Sections 2.5 and 3.7. Since the development of the seismic inputs for DCPP predates the issuance of 10 CFR 100, Appendix A, "Seismic and Geologic Siting Criteria for Nuclear Power Plants," the following DCPP-specific earthquakes are defined: Design Earthquake The design earthquake (0.2g) is defined as the maximum size earthquake that can be expected to occur at DCPP during the life of the reactor. The design earthquake is the equivalent of the operating basis earthquake, as described in 10 CFR 100, Appendix A.
 Double Design Earthquake Enclosure 1 PG&E DCL-12-119 Page 2 of 15 The double design earthquake (0.4g) is defined as the hypothetical earthquake that would produce accelerations twice those of the design earthquake.
-The double design earthquake is the equivalent of the safe shutdown earthquake, as described in 10 CFR 100, Appendix A. Hosgri Earthquake The Hosgri earthquake (0.75g) is defined as the predicted ground motion at DCPP due to a Richter magnitude 7.5 earthquake on the offshore Hosgri fault. The Hosgri earthquake does not correspond to an operating basis earthquake or safe shutdown earthquake.
+The double design earthquake is the equivalent of the safe shutdown earthquake, as described in 10 CFR 100, Appendix A. Hosgri Earthquake The Hosgri earthquake (0.75g) is defined as the predicted ground motion at DCPP due to a Richter magnitude
+===7.5 earthquake===
+on the offshore Hosgri fault. The Hosgri earthquake does not correspond to an operating basis earthquake or safe shutdown earthquake.
 Long Term Seismic Program In addition to the above three earthquakes, PG&E implemented a program to reevaluate DCPP's seismic design, as described below. As part of the operating license issuance for DCPP Unit 1, the NRC imposed a license condition that required in part: "PG&E shall develop and implement a program to reevaluate the seismic design bases used for the DCPP." PG&E's reevaluation effort in response to the license condition was titled the "Long Term Seismic Program." In June 1991, the NRC issued SSER 34, in which the NRC concluded that PG&E had satisfied the license condition described above. In SSER 34, the NRC requested certain confirmatory analyses from PG&E, and PG&E subsequently submitted the requested analyses.
 The NRC's final acceptance of the L TSP is documented in a letter to PG&E dated April 17, 1992. Although the L TSP contains extensive databases and analyses that update the basic geologic and seismic information in the UFSAR, the L TSP material does not alter the design bases for DCPP. In SSER 34, the NRC states: "The Staff notes that the seismic qualification basis for Diablo Canyon will continue to be the original design basis plus the Hosgri evaluation basis, along with associated analytical methods, initial conditions, etc." Classification of SSCs The classification system applicable to SSCs at DCPP is described in the UFSAR, Section 3.2. Since the development of the classification system for DCPP predates Regulatory Guide 1.29, "Seismic Design Classification," DCPP does not use SC I terminology.
@@ Line 1,022: / Line 1,035: @@
 SI Pymp Suction Valves' from RWST Comment: 32 Inch distance from middle of operator to piping. 6" pipe diameter.
 Evaluated by: Page 2 of 10 Seismic Checklist y
-Equipment 10 No PC-2-1Q-M-HX-RHIi;1 Equipment 2.1 Equipment Desoription:
+Equipment 10 No PC-2-1Q-M-HX-RHIi;1 Equipment
+===2.1 Equipment===
+Desoription:
 RHR Heat Exchanger No.1 Location:
 uUdfng: FioprEI. 1.3 Ro.o.m. Area: 2::.BI:iE.1 model. Etc. (nstructions for CompletIng Checklist ThIs checJdlst may be used to dooument the reSUlts of the SelsmIo of an. item of equipment on th.e SWEL The space each of t{'le following qU$stlons may be. used to record tna results' of Judgements and .findIngs.

ML12333A270: Difference between revisions

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2.3 Seismic

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ML12333A270: Difference between revisions

Latest revision as of 03:08, 18 March 2019

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2.3 Seismic

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2.3 Seismic

2.3 Seismic

7.5 earthquake

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2.1 Equipment

Description:

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