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ENS 53401
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 May 14, 2018, during evaluation of prot … On May 14, 2018, during evaluation of protection for Technical Specification (TS) equipment from the damaging effects of a tornado generated missile, Calvert Cliffs identified a non-conforming condition in the plant design such that specific TS equipment is considered to not be adequately protected from a tornado generated missile. A tornado could generate a missile that could strike the Unit 1 Saltwater system header and associated piping. This could result in damage to the unit 1 Saltwater system header which could affect the ability of the Unit 1 Saltwater subsystems to perform their 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
17:05:00, 14 May 2018  +
EGM
EGM 15-02, Enforcement Discretion for Tornado-Generated Missile Protection Noncompliance +
ENS id number
53,401  +
Emergency class
Non Emergency +
Entered date
13:17:00, 14 May 2018  +
Event date
17:05:00, 14 May 2018  +
Event description
On May 14, 2018, during evaluation of prot … On May 14, 2018, during evaluation of protection for Technical Specification (TS) equipment from the damaging effects of a tornado generated missile, Calvert Cliffs identified a non-conforming condition in the plant design such that specific TS equipment is considered to not be adequately protected from a tornado generated missile. A tornado could generate a missile that could strike the Unit 1 Saltwater system header and associated piping. This could result in damage to the unit 1 Saltwater system header which could affect the ability of the Unit 1 Saltwater subsystems to perform their 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.  +
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ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +, ENS 53401 +  and ENS 53401 +
Initial power
100  +
Initial reactor mode
Power Operation +
Interim Staff Guidance
DSS-ISG-2016-01 +
Last update date
00:00:00, 14 May 2018  +
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>.
12:01:19, 15 May 2018  +
NRC officer
Donald Norwood +
Notification date
13:17:00, 14 May 2018  +
Originated by
Dan Geneva +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
CE +
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
-0.158 d (-3.8 hours, -0.0226 weeks, -0.00521 months)  +
Site
Calvert Cliffs +
Start date
17:05:00, 14 May 2018  +
State
Maryland +
Title
Saltwater System 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/2018/20180515en.html#en53401  +
Unit
1  +
 
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