ML15225A317: Difference between revisions

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| document type = E-Mail
| document type = E-Mail
| page count = 2
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| project = TAC:MF2591
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{{#Wiki_filter:1NRR-PMDAPEm ResourceFrom:Dean, BillSent:Tuesday, July 07, 2015 1:31 PMTo:Dave LochbaumCc:Dapas, Marc; Markley, Michael; Lyon, Fred; Evans, Michele; Uhle, JenniferSubject:RE: Flood protection at Fort CalhounDave Thanks for the well written and safety-focused letter. It may take us a little time to get you a response, but we will strive to get you something in 4-6 weeks. I would think that the questions you raised were considered in our assessment of the amendment, but since it isn't clear to you from your review of the available documentation, then we maybe could have been a bit more thorough in our Safety Evaluation. BILL  From: Dave Lochbaum [mailto:DLochbaum@ucsusa.org]  Sent: Tuesday, July 07, 2015 9:15 AM To: Dean, Bill Cc: Dapas, Marc; Markley, Michael; Lyon, Fred Subject: [External_Sender] Flood protection at Fort Calhoun  Hello Bill:
Attached is a letter with two concerns about an amendment recently issued by the NRC about flood protection at Fort Calhoun.
As described in the letter, the "fix" approved by the NRC with this amendment seems to now make the plant vulnerable to a single failure; something the "unfixed" design avoided.
Also as described in the letter, whereas the NRC staff compelled the licensee to seismically qualify new valves and piping needed for the "fix," neither the licensee nor the NRC staff addressed the seismic qualification of the non-safety-related sluice gates. If all the sluice gates do not close all the way, it matters little whether the valves and piping survive or not - the flood protection won't work at all (unless there's not a flood).
Bottom line - it looks like the "fix" is little more than a different way of not adequately protecting the raw water pumps from flooding damage. 
Thanks, Dave Lochbaum UCS Hearing Identifier:  NRR_PMDA  Email Number:  2295  Mail Envelope Properties  (A67A2D233B3FBB4C8B5109AD7C39550715C5031A80)
Subject:  RE: Flood protection at Fort Calhoun  Sent Date:  7/7/2015 1:31:27 PM  Received Date:  7/7/2015 1:31:30 PM  From:    Dean, Bill  Created By:  Bill.Dean@nrc.gov  Recipients:    "Dapas, Marc" <Marc.Dapas@nrc.gov>  Tracking Status: None  "Markley, Michael" <Michael.Markley@nrc.gov>
Tracking Status: None  "Lyon, Fred" <Fred.Lyon@nrc.gov>  Tracking Status: None "Evans, Michele" <Michele.Evans@nrc.gov>  Tracking Status: None  "Uhle, Jennifer" <Jennifer.Uhle@nrc.gov>
Tracking Status: None  "Dave Lochbaum" <DLochbaum@ucsusa.org>  Tracking Status: None Post Office:  HQCLSTR01.nrc.gov  Files    Size      Date & Time  MESSAGE    1606      7/7/2015 1:31:30 PM Options  Priority:    Standard  Return Notification:    No  Reply Requested:    No  Sensitivity:    Normal  Expiration Date:      Recipients Received:       
}}
}}

Revision as of 17:41, 21 March 2018

2015/07/07 NRR E-mail Capture - Flood Protection at Fort Calhoun
ML15225A317
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 07/07/2015
From: Dean W M
Office of Nuclear Reactor Regulation
To: Lochbaum D
Union of Concerned Scientists
References
TAC MF2591
Download: ML15225A317 (2)
v • d • e


Text

1NRR-PMDAPEm ResourceFrom:Dean, BillSent:Tuesday, July 07, 2015 1:31 PMTo:Dave LochbaumCc:Dapas, Marc; Markley, Michael; Lyon, Fred; Evans, Michele; Uhle, JenniferSubject:RE: Flood protection at Fort CalhounDave Thanks for the well written and safety-focused letter. It may take us a little time to get you a response, but we will strive to get you something in 4-6 weeks. I would think that the questions you raised were considered in our assessment of the amendment, but since it isn't clear to you from your review of the available documentation, then we maybe could have been a bit more thorough in our Safety Evaluation. BILL From: Dave Lochbaum [1] Sent: Tuesday, July 07, 2015 9:15 AM To: Dean, Bill Cc: Dapas, Marc; Markley, Michael; Lyon, Fred Subject: [External_Sender] Flood protection at Fort Calhoun Hello Bill:

Attached is a letter with two concerns about an amendment recently issued by the NRC about flood protection at Fort Calhoun.

As described in the letter, the "fix" approved by the NRC with this amendment seems to now make the plant vulnerable to a single failure; something the "unfixed" design avoided.

Also as described in the letter, whereas the NRC staff compelled the licensee to seismically qualify new valves and piping needed for the "fix," neither the licensee nor the NRC staff addressed the seismic qualification of the non-safety-related sluice gates. If all the sluice gates do not close all the way, it matters little whether the valves and piping survive or not - the flood protection won't work at all (unless there's not a flood).

Bottom line - it looks like the "fix" is little more than a different way of not adequately protecting the raw water pumps from flooding damage.

Thanks, Dave Lochbaum UCS Hearing Identifier: NRR_PMDA Email Number: 2295 Mail Envelope Properties (A67A2D233B3FBB4C8B5109AD7C39550715C5031A80)

Subject: RE: Flood protection at Fort Calhoun Sent Date: 7/7/2015 1:31:27 PM Received Date: 7/7/2015 1:31:30 PM From: Dean, Bill Created By: Bill.Dean@nrc.gov Recipients: "Dapas, Marc" <Marc.Dapas@nrc.gov> Tracking Status: None "Markley, Michael" <Michael.Markley@nrc.gov>

Tracking Status: None "Lyon, Fred" <Fred.Lyon@nrc.gov> Tracking Status: None "Evans, Michele" <Michele.Evans@nrc.gov> Tracking Status: None "Uhle, Jennifer" <Jennifer.Uhle@nrc.gov>

Tracking Status: None "Dave Lochbaum" <DLochbaum@ucsusa.org> Tracking Status: None Post Office: HQCLSTR01.nrc.gov Files Size Date & Time MESSAGE 1606 7/7/2015 1:31:30 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:

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