ML15232A331
| ML15232A331 | |
| Person / Time | |
|---|---|
| Site: | Three Mile Island  |
| Issue date: | 07/30/2015 |
| From: | Clark J Exelon Corp |
| To: | Steve Wyman Japan Lessons-Learned Division |
| References | |
| Download: ML15232A331 (5) | |
Text
NRR-PMDAPEm Resource From: Clark, Jeffrey S.:(GenCo-Nuc) [Jeffrey.Clark2@exeloncorp.com]
Sent: Thursday, July 30, 2015 8:22 PM To: Wyman, Stephen Cc: DiFrancesco, Nicholas; Distel, David J:(GenCo-Nuc); Aggarwal, Vinod K:(GenCo-Nuc);
Behrend, Chuck L.:(GenCo-Nuc); Mullens, Patrick J.:(GenCo-Nuc); Bennett, Patrick A:(GenCo-Nuc)
Subject:
[External_Sender] RE: Three Mile Island ESEP NRC Question Response Attachments: Response to NRC Question for TMI ESEP Report 7 30 15 FINAL.docx Mr. Wyman, In response to your initial email request below, Exelon is pleased to provide you with the attached response (2 pages) to your question on the Three Mile Island ESEP Report submittal. Based on our previous discussions we are providing you this information on our extended date of July 30, 2015. Please feel free to contact us with any further questions or clarifications needed to support the NRCs ESEP report reviews.
Thank You, Jeff Clark Jeffrey S. Clark, PE Senior Staff Engineer Fukushima Response Seismic Lead Exelon Nuclear Jeffrey.S.Clark@exeloncorp.com 4300 Winfield Road Warrenville, IL 60555 630-657-3876 (Work) 224-419-1450 (cell)
From: Wyman, Stephen [1]
Sent: Tuesday, July 21, 2015 10:00 AM To: Clark, Jeffrey S.:(GenCo-Nuc)
Subject:
[EXTERNAL]
TMI Please hold a PM call with the licensee and ask them this clarification question, for which a verbal answer will likely suffice:
The staffs review of the HCLPF table noted that the rule-of-the-box is referenced for 20 out of the 100 ESEL items.
Eleven (11) items (37, 40, 42, 43, 65, 69, 76, 80, 91, 93, and 96) have the note: Rule of Box to CR Console CC. The staff could not identify the console in the ESEL. For 2 additional items (74, 75), the rule-of-the-box reference is to a parent component that the staff could not identify in the ESEL. Please identify where in the ESEL these 3 parent components are listed. If not listed in the ESEL, explain why it is not necessary to include them in the ESEL Stephen M. Wyman 1
USNRC/NRR/JLD/HMB Office: O-13G9 MS: O-13C5 301-415-3041 (Voice) 301-415-8333 (Fax)
Stephen.Wyman@nrc.gov This Email message and any attachment may contain information that is proprietary, legally privileged, confidential and/or subject to copyright belonging to Exelon Corporation or its affiliates ("Exelon"). This Email is intended solely for the use of the person(s) to which it is addressed. If you are not an intended recipient, or the employee or agent responsible for delivery of this Email to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this Email is strictly prohibited. If you have received this message in error, please immediately notify the sender and permanently delete this Email and any copies.
Exelon policies expressly prohibit employees from making defamatory or offensive statements and infringing any copyright or any other legal right by Email communication. Exelon will not accept any liability in respect of such communications. -EXCIP 2
Hearing Identifier: NRR_PMDA Email Number: 2315 Mail Envelope Properties (9717B5461B966646BAF3352111206D75793CA231)
Subject:
[External_Sender] RE: Three Mile Island ESEP NRC Question Response Sent Date: 7/30/2015 8:21:41 PM Received Date: 7/30/2015 8:22:09 PM From: Clark, Jeffrey S.:(GenCo-Nuc)
Created By: Jeffrey.Clark2@exeloncorp.com Recipients:
"DiFrancesco, Nicholas" <Nicholas.DiFrancesco@nrc.gov>
Tracking Status: None "Distel, David J:(GenCo-Nuc)" <David.Distel@exeloncorp.com>
Tracking Status: None "Aggarwal, Vinod K:(GenCo-Nuc)" <Vinod.Aggarwal@exeloncorp.com>
Tracking Status: None "Behrend, Chuck L.:(GenCo-Nuc)" <chuck.behrend@exeloncorp.com>
Tracking Status: None "Mullens, Patrick J.:(GenCo-Nuc)" <Patrick.Mullens@exeloncorp.com>
Tracking Status: None "Bennett, Patrick A:(GenCo-Nuc)" <Patrick.Bennett@exeloncorp.com>
Tracking Status: None "Wyman, Stephen" <Stephen.Wyman@nrc.gov>
Tracking Status: None Post Office: EXCHM-OMF-25.exelonds.com Files Size Date & Time MESSAGE 2699 7/30/2015 8:22:09 PM Response to NRC Question for TMI ESEP Report 7 30 15 FINAL.docx 30911 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received:
Exelon Response to USNRC Questions for TMI ESEP Report In response to the email request dated July 21, 2015 from the USNRCs Mr. Stephen Wyman, Exelon is pleased to provide you with the response below. Please feel free to contact us with any further questions or clarifications needed to support the NRCs ESEP report reviews.
Question 1:
The staffs review of the HCLPF table noted that the rule-of-the-box is referenced for 20 out of the 100 ESEL items. Eleven (11) items (37, 40, 42, 43, 65, 69, 76, 80, 91, 93, and 96) have the note: Rule of Box to CR Console CC. The staff could not identify the console in the ESEL. For 2 additional items (74, 75), the rule-of-the-box reference is to a parent component that the staff could not identify in the ESEL. Please identify where in the ESEL these 3 parent components are listed. If not listed in the ESEL, explain why it is not necessary to include them in the ESEL.
Response to Question 1:
The ESEL parent components for all of the ESEL items listed in the question above are included in the TMI ESEP report submitted in December 2014 in Table B-1 TMI Unit 1 ESEP HCLPF Values and Failure Mode Tabulation, but are not included in Table A-1TMI Unit 1 ESEL. The parent components are identified in the Additional Discussion column of Table B-1 and are dispositioned to Tech Eval 14-00473 in all cases except for the ICS NNI Power Monitoring Cabinet which is dispositioned to the NP-6041, Table 2-4 screening criteria. All parent components associated with ESEL rule-of-the-box components were appropriately evaluated per EPRI 3002000704 (ESEP Guidance) and are documented in the referenced Technical Evaluation 14-00473, as applicable. The supporting technical basis for the evaluations is complete and referenced in the ESEP Report. Therefore, Exelon concludes that it is not necessary to include the subject host/parent components in the ESEL as the evaluations are complete.
Exelon recognizes that inclusion of the parent components would have resulted in a more complete and appropriate ESEL. The decision not to include may have been influenced by EPRI 3002000704 which is silent on including parent components separately on the ESEL.
The following tables are extensions of the submitted TMI ESEP report Tables A-1 and Table B-1 and include the 6 additionalparent components associated with the ESEL items listed in the question above. These tables contain the identical format and information fields as in the submitted report and are intended 1
Exelon Response to USNRC Questions for TMI ESEP Report tosupport the response to this question only. For each parent item the tables below provide the information that is included in the ESEP Report and the supporting technical documents.
TableA-1:Supplemental Lines Equipment Operating State ESELItem Notes/Comments Number ID Description Normal State Desired State Control Room Console Center In Service In Service Parent to ESEL Items:
101 CC Panel 37, 40, 76, 80, 91 Control Room Panel Left Front In Service In Service Parent to ESEL Items:
102 PLF 42, 43, 96 In Service In Service Parent to ESEL Items:
103 PCL Control Room Panel Center Left 65, 69, 93 In Service In Service Parent to ESEL Item:
Multiplexer Cabinet 3 Multiplexer Cabinet 3 104 74 ICS NNI Power Monitor In Service In Service Parent to ESEL Item:
ICS NNI Power Monitor Cabinet 105 Cabinet 75 TableB-1:Supplemental Lines ESELItem Equipment ID FailureMode HCLPF(g) Additional Discussion Number 101 CC Anchorage 0.50 HCLPFcalculated in TechEval14-00473.
102 PLF Anchorage 0.50 HCLPFcalculated in TechEval14-00473.
103 PCL Anchorage 0.50 HCLPFcalculated in TechEval14-00473.
Anchorage Multiplexer Cabinet 3 0.33 HCLPFcalculated in TechEval14-00473.
104 MeetsNP-6041Table2-4caveats ICS NNI Power Screened
>RLGM /anchorage(asapplicable) 105 Monitor Cabinet judgedtobeadequateby SRT.
2