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ENS 52478
Show incoming properties
Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition +, 10 CFR 50.72#b3iiB +  and 10 CFR 50.72#b3vD +
Current power
100  +
Current reactor mode
Power Operation +
Description
On January 9, 2017, during evaluation of p … On January 9, 2017, during evaluation of protection for Technical Specification (TS) equipment from the damaging effects of tornado generated missiles, Peach Bottom Atomic Power Station identified a non-conforming condition in the plant design such that specific TS equipment is considered to not be adequately protected from tornado generated missiles. A tornado could generate multiple missiles that could strike one or more of the four emergency diesel generator (EDG) exhaust stacks. This could result in crimping of the stack, which could affect the ability of the EDG to perform its design function if such a tornado would occur.</br>This condition is reportable per 10 CFR 50.72(b)(3)(ii)(B) for any event or condition that results in the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety, and per 10 CFR 50.72(b)(3)(v)(D) for any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.</br>This condition is being addressed in accordance with NRC enforcement guidance provided in EGM 15-002 and DSS-ISG-2016-01. Compensatory measures have been implemented in accordance with these documents.</br>The NRC Resident Inspector has been informed of this notification.or has been informed of this notification.  +
Discovered date
20:30:00, 9 January 2017  +
EGM
EGM 15-02, Enforcement Discretion for Tornado-Generated Missile Protection Noncompliance +
ENS id number
52,478  +
Emergency class
Non Emergency +
Entered date
16:56:00, 9 January 2017  +
Event date
20:30:00, 9 January 2017  +
Event description
On January 9, 2017, during evaluation of p … On January 9, 2017, during evaluation of protection for Technical Specification (TS) equipment from the damaging effects of tornado generated missiles, Peach Bottom Atomic Power Station identified a non-conforming condition in the plant design such that specific TS equipment is considered to not be adequately protected from tornado generated missiles. A tornado could generate multiple missiles that could strike one or more of the four emergency diesel generator (EDG) exhaust stacks. This could result in crimping of the stack, which could affect the ability of the EDG to perform its design function if such a tornado would occur.</br>This condition is reportable per 10 CFR 50.72(b)(3)(ii)(B) for any event or condition that results in the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety, and per 10 CFR 50.72(b)(3)(v)(D) for any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.</br>This condition is being addressed in accordance with NRC enforcement guidance provided in EGM 15-002 and DSS-ISG-2016-01. Compensatory measures have been implemented in accordance with these documents.</br>The NRC Resident Inspector has been informed of this notification.or has been informed of this notification.  +
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>.
ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +, ENS 52478 +  and ENS 52478 +
Initial power
100  +
Initial reactor mode
Power Operation +
Interim Staff Guidance
DSS-ISG-2016-01 +
Last update date
00:00:00, 9 January 2017  +
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>.
01:41:51, 2 March 2018  +
NRC officer
Steven Vitto +
Notification date
16:56:00, 9 January 2017  +
Originated by
Mike Schweigler +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
GE-4 +
Region
NRC Region 1 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +  and 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition +
Reporting time
-0.149 d (-3.57 hours, -0.0212 weeks, -0.00489 months)  +
Site
Peach Bottom +
Start date
20:30:00, 9 January 2017  +
State
Pennsylvania +
System
Emergency Diesel Generator +
Title
Emergency Diesel Generators Non-Conforming with Licensing Basis for Tornado Generated Missiles  +
Topic
Unanalyzed Condition +, Time of Discovery +  and Tornado Generated Missile +
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://www.nrc.gov/reading-rm/doc-collections/event-status/event/2017/20170110en.html#en52478  +
Unit
2  +  and 3  +
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