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05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability
Show incoming properties
Category
Letter, Licensee Event Report (LER)  and Licensee Event Report
Accession number
ML23142A189  +
Atomic Element
Lead +  and Nitrogen +
CFR
10 CFR 50.73 +, 10 CFR 50.73#a2iB +  and 10 CFR 50.73#a2vA +
Correspondence
NRC-23-0027 +
Docket
05000341  +  and 00341  +
ENS
ENS 56429 +
From
Peter Dietrich +  and DTE Energy +
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +, 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +  and 05000341/LER-2023-001, Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability +
Hours
2.314815e-5 d (5.555556e-4 hours, 3.306878e-6 weeks, 7.61e-7 months)  +, 4.62963e-5 d (0.00111 hours, 6.613757e-6 weeks, 1.522e-6 months)  +, 5.787037e-5 d (0.00139 hours, 8.267196e-6 weeks, 1.9025e-6 months)  +, 8.333333e-4 d (0.02 hours, 1.190476e-4 weeks, 2.7396e-5 months)  +, 1.388889e-4 d (0.00333 hours, 1.984127e-5 weeks, 4.566e-6 months)  +, 4.166667e-4 d (0.01 hours, 5.952381e-5 weeks, 1.3698e-5 months)  +  and 6.944444e-5 d (0.00167 hours, 9.920635e-6 weeks, 2.283e-6 months)  +
Issue date
May 22, 2023  +
LER number
1  +
LER year
2,023  +
Licensing Basis Document
Updated Final Safety Analysis Report +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
11:25:53, 21 February 2026  +
NRC
NRC-23-0027 +
Page count
1  +
Project stage
Request  +
Reporting criterion
10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor +  and 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications +
Site
Fermi +
Site license
NPF-43 +
Start date
May 22, 2023  +
State
Washington +
System
Service water +, Emergency Diesel Generator +, Core Spray +, Emergency Equipment Cooling Water +  and Residual Heat Removal Service Water +
TS
TS-3.7.2 +, TS-3.8.1 +, TS-3.4.8 +  and TS-3.0.9 +
Title
Loss of Mechanical Draft Cooling Tower Fan Brakes During High Speeds Leads to Loss of Safety Function and Inoperability  +
To
Office of Nuclear Reactor Regulation +  and Document Control Desk +
Topic
Safe Shutdown +, Time of Discovery +, Ultimate heat sink +, Past operability +, Loss of Offsite Power +  and Overspeed +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.
https://lersearch.inl.gov/Index.aspx?Page=PDFView?Doc::3412023001R00.pdf  +  and http://pbadupws.nrc.gov/docs/ML2314/ML23142A189.pdf  +
Ultimate Heat Sink
Cooling Tower +
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