Seismic Walkdown (Task 4) - Revision history

SeismicAdmin at 17:21, 30 July 2024

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SeismicAdmin at 14:47, 30 July 2024

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SeismicAdmin: /* EPRI Guidance */

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EPRI Guidance

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en>SeismicAdmin at 17:44, 16 May 2022

2022-05-16T17:44:12Z

New page

==Task Overview==

===Objective===
The objective is to walkdown the SSCs in the seismic equipment list to assess their vulnerability in a seismic event. Potential seismic interactions and operator access pathways are also evaluated during a walkdown.

===Purpose===
This section describes a process for examining SSCs on the SEL via plant walkdown. It is suggested that all items on the initial PRA components list be physically examined for seismic vulnerabilities, if possible, and their locations recorded. The suggested emphasis is on evaluations against screening cautions, anchorage and attachment of subassemblies and parts, and seismic spatial systems interactions, including the potential for seismically induced fires and floods. Items on the initial list may be subdivided or combined, as appropriate, for further assessment.

===Guidance===
The following steps are often included for the plant walkdown task.
# Review the equipment list prepared by the systems analysts.
# Prepare walkdown sequence. This step usually involves coordination with plant operations to lay out a schedule and route that minimize any effect on plant operations or maintenance.
# Conduct the walkdown. During the walkdown, SSCs are examined to accomplish the following:
::* Assess seismic failure modes.
::* Verify anchorage capacities.
::* Identify potential spatial systems interactions (such as fire and flooding sources, potential for actuation of fire-suppression systems, block walls, displacements that cause impacts, and so on).
::* Take field dimensions and document the SSCs with photographs and sketches as appropriate.

==Supplemental Guidance==

===Related Element of ASME/PRA Standard===
Part 5, Seismic Plant Response (SPR)

===EPRI Guidance===
''Seismic Fragility and Seismic Margin Guidance for Seismic Probabilistic Risk Assessments (3002012994)

''A Methodology for Assessment of Nuclear Power Plant Seismic Margin, Revision 1'' (NP 6041-SL R1)

''Generic Implementation Procedure (GIP) for Seismic Verification of Nuclear Power Plant Equipment'', Seismic Qualification Utility Group (SQUG)
* EPRI provides SQUG Walkdown Screening and Seismic Evaluation Training through EPRI|U.

===Other Guidance===
(none noted)

@@ Line 25: / Line 25: @@
 ''Seismic Fragility and Seismic Margin Guidance for Seismic Probabilistic Risk Assessments ([https://www.epri.com/research/products/000000003002012994 3002012994])
-''A Methodology for Assessment of Nuclear Power Plant Seismic Margin, Revision 1'' ([https://www.epri.com/research/products/00000000NP-6041-SLR1 NP-6041-SLR1])
+''A Methodology for Assessment of Nuclear Power Plant Seismic Margin, Revision 1'' ([https://www.epri.com/research/products/NP-6041-SLR1 NP-6041-SLR1])
 ''Generic Implementation Procedure ([https://squg.epri.com/Members/GIP GIP]) for Seismic Verification of Nuclear Power Plant Equipment'', Seismic Qualification Utility Group (SQUG)

@@ Line 23: / Line 23: @@
 ===EPRI Guidance===
-''Seismic Fragility and Seismic Margin Guidance for Seismic Probabilistic Risk Assessments ([http://www.epri.com/abstracts/Pages/ProductAbstract.aspx?ProductId=3002012994 3002012994])
+''Seismic Fragility and Seismic Margin Guidance for Seismic Probabilistic Risk Assessments ([https://www.epri.com/research/products/000000003002012994 3002012994])
-''A Methodology for Assessment of Nuclear Power Plant Seismic Margin, Revision 1'' ([http://www.epri.com/abstracts/Pages/ProductAbstract.aspx?ProductId=NP-6041-SLR1 NP-6041-SLR1])
+''A Methodology for Assessment of Nuclear Power Plant Seismic Margin, Revision 1'' ([https://www.epri.com/research/products/00000000NP-6041-SLR1 NP-6041-SLR1])
 ''Generic Implementation Procedure ([https://squg.epri.com/Members/GIP GIP]) for Seismic Verification of Nuclear Power Plant Equipment'', Seismic Qualification Utility Group (SQUG)

← Older revision	Revision as of 22:15, 31 May 2022
(No difference)

@@ Line 23: / Line 23: @@
 ===EPRI Guidance===
-''Seismic Fragility and Seismic Margin Guidance for Seismic Probabilistic Risk Assessments (3002012994)
+''Seismic Fragility and Seismic Margin Guidance for Seismic Probabilistic Risk Assessments ([http://www.epri.com/abstracts/Pages/ProductAbstract.aspx?ProductId=3002012994 3002012994])
-''A Methodology for Assessment of Nuclear Power Plant Seismic Margin, Revision 1'' (NP 6041-SL R1)
+''A Methodology for Assessment of Nuclear Power Plant Seismic Margin, Revision 1'' ([http://www.epri.com/abstracts/Pages/ProductAbstract.aspx?ProductId=NP-6041-SLR1 NP-6041-SLR1])
-''Generic Implementation Procedure (GIP) for Seismic Verification of Nuclear Power Plant Equipment'', Seismic Qualification Utility Group (SQUG)
+''Generic Implementation Procedure ([https://squg.epri.com/Members/GIP GIP]) for Seismic Verification of Nuclear Power Plant Equipment'', Seismic Qualification Utility Group (SQUG)
-* EPRI provides SQUG Walkdown Screening and Seismic Evaluation Training through EPRI|U.
+* EPRI provides SQUG Walkdown Screening and Seismic Evaluation Training through [https://www.epri.com/epri-u/courses/bf5f56c0-ffd2-43e1-8a56-9e0aa98be8d7 EPRI|U].
 ===Other Guidance===
 (none noted)

← Older revision	Revision as of 20:51, 19 May 2022
(No difference)