ML12123A735
| ML12123A735 | |
| Person / Time | |
|---|---|
| Site: | Kewaunee  |
| Issue date: | 05/02/2012 |
| From: | Feintuch K Division of Operating Reactor Licensing |
| To: | Feintuch K Division of Operating Reactor Licensing |
| References | |
| TAC ME8460 | |
| Download: ML12123A735 (6) | |
Text
NRR-PMDAPEm Resource From: Feintuch, Karl Sent: Wednesday, May 02, 2012 11:11 AM To: Feintuch, Karl
Subject:
ME8460 (successor to ME8205) - KEWAUNEE - 10 CFR 50.46, 30-DAY RESPONSE - RAI Conference Call - REPLACEMENT DRAFT ITEMS - Record of conference call Record of conference call on 4/30/2012 and ADAMS Accession Number addressed in agenda
====== update 2012-04-05-02-1100 ET =========
ML12118A465 = ME8460 (successor to ME8205) - KEWAUNEE POWER STATION - 10 CFR 50.46, 30-DAY RESPONSE -
REQUEST FOR ADDITIONAL INFORMATION - REPLACEMENT DRAFT ITEMS (email dated April 26, 2012, 9:04 AM)
====== update 2012-04-30-1725 ET =========
The call started on time with the following attendance For NRC: Karl Feintuch. Ben Parks, Jason Paige For Kewaunee and Dominion: Margaret Earle, Jack Gadzala, Dana Knee, Kurt Flaig, Rebecca Fawls, Stephen ORearn, John Holly Interpretation of various items was discussed as well as the need for additional information to supplement some questions. The expected RAI response will include a comprehensive list of needed items introducing the associated response. Subsequent clarification calls may be scheduled.
The licensee affirmed an expected date for the responses as May 30, 2012. This date corresponds to 2012-05-30 in the RAI tracking numbers for each RAI in the email request of Thursday, April 26, 2012 9:04 AM:
ME8460-RAII-SRXB-Parks-001-2012-05-30 ME8460-RAII-SRXB-Parks-002-2012-05-30 ME8460-RAII-SRXB-Parks-003-2012-05-30 ME8460-RAII-SRXB-Parks-004-2012-05-30 ME8460-RAII-SRXB-Parks-005-2012-05-30 ME8460-RAII-SRXB-Parks-006-2012-05-30 ME8460-RAII-SRXB-Parks-007-2012-05-30 ME8460-RAII-SRXB-Parks-008-2012-05-30 ME8460-RAII-DORL-Paige-009-2012-05-30 Items Park-001 and Park-001 will appear in the Response document marked as deleted and with no response content.
====== update 2012-04-30-1130 ET =========
Margaret Earle will substitute for Craig Sly as Kewaunee / Dominion host on this call and has been added as an invitee. If item DORL-Paige-009 is not at issue, Jason can leave immediately (Margaret did not know.)
The Bridge Line information is the same: 866-740-1260 Passcode 273-2784#
====== update 2012-04-30-0807 ET =========
We would have had to leave Jays room by 1:30 PM. Suggest you (Ben, Jason) call in from your own offices unless you can find an empty BC office. I will call in from telework.
Scroll down for all RAI items. Kewaunee / Dominion licensing contacts are on distribution list for this Outlook appointment.
1
====== update 2012-04-30-0137 ET =========
Jason, Ben please find a room unless you would like to call in from your own offices. I am working from home due to a verbal relief effort for Kewaunee extending through the weekend.
I will call in to the bridge line.
Jay Robinson controls 10B2 and may allow its use.
This update solicits a meeting room reservation for O-10B02.
========== original message ===========
Meeting room for NRC staff to be determined. Information will be distributed as an update to this message.
From: Craig D Sly [1]
Sent: Thursday, April 26, 2012 11:28 AM To: Feintuch, Karl; Jack Gadzala Cc: Paige, Jason; Parks, Benjamin
Subject:
RE: ME8460 (successor to ME8205) - KEWAUNEE POWER STATION - 10 CFR 50.46, 30-DAY RESPONSE -
REQUEST FOR ADDITIONAL INFORMATION - REPLACEMENT DRAFT ITEMS
- Karl, Thanks very much. Per your proposal below, Im set up on my end for a telephone call at 1 pm on Monday April 30 at 1 pm. I have arranged the following Ready Talk call in number:
866-740-1260 Passcode 273-2784#
If you desire to use an NRC number, please let me know and well use it.
- Regards, Craig Sly Dominion Resources Services, Inc.
Nuclear Licensing and Operations Support W: 804-273-2784 C: 804-241-2473 From: Feintuch, Karl [2]
Sent: Thursday, April 26, 2012 9:04 AM To: Jack Gadzala (Generation - 4); Craig D Sly (Generation - 6)
Cc: Paige, Jason; Parks, Benjamin
Subject:
FW: ME8460 (successor to ME8205) - KEWAUNEE POWER STATION - 10 CFR 50.46, 30-DAY RESPONSE -
REQUEST FOR ADDITIONAL INFORMATION - REPLACEMENT DRAFT ITEMS From: Feintuch, Karl [3]
To: Craig D Sly (Generation - 6); Jack Gadzala (Generation - 4)
Cc: Paige, Jason; Parks, Benjamin 2
Subject:
ME8460 (successor to ME8205) - KEWAUNEE POWER STATION - 10 CFR 50.46, 30-DAY RESPONSE - REQUEST FOR ADDITIONAL INFORMATION - REPLACEMENT DRAFT ITEMS By letter dated March 15, 2012 (ADAMS Accession No. ML12079A287), the licensee, Kewaunee Power Station, submitted a Title 10 Code of Federal Regulations (10 CFR) 50.54(f) response to the NRCs information request related to the estimated effect on peak cladding temperature resulting from thermal conductivity degradation in the Westinghouse furnished realistic emergency core cooling evaluation. The licensee also stated that this response served as a 30-day report in accordance with requirements of 10 CFR 50.46.
In the course of the Reactor Systems Branch (SRXB) 10 CFR 50.46 response review, the NRC staff has determined that additional information is necessary to complete its review. In an email message dated Friday, March 23, 2012 3:50 PM, I (Project Manager Karl Feintuch) transmitted Draft Items from SRXB staff. A replacement email message was sent on Monday, April 23, 2012 3:56 PM.
This current email message is a replacement in the entirety for the messages of Friday, March 23, 2012 3:50 PM and of Monday, April 23, 2012 3:56 PM. The changes are in items 1 and 4 (both deleted), 5a, 5b, 6 (all changed text), and an added item 9 below. Italics are used to emphasize changed text and are not part of the RAI.
The NRC staff requests a prompt response to the replacement RAI items (RAII). The NRC staff requests an acknowledgement of these RAIIs and their proposed request by date(s), or a clarification call to resolve this information. For a clarification call the NRC staff proposes Monday, April 30, 2012, at 1:00 PM ET. The participating Reviewer would be Benjamin Parks.
The NRC staffs replacement request for additional information follows. Please contact Karl Feintuch (301-415-3079) to discuss the schedule for response or any need for clarification.
KEWAUNEE POWER STATION 10 CFR 50.46, 30-DAY RESPONSE REQUEST FOR ADDITIONAL INFORMATION (RAI)
REPLACEMENT DRAFT ITEMS Consistent with the identification of RAI items (RAII) for other projects, each of the 9 RAII below are assigned tracking numbers:
ME8460-RAII-SRXB-Parks-001-2012-05-23 ME8460-RAII-SRXB-Parks-002-2012-05-23 ME8460-RAII-SRXB-Parks-003-2012-05-23 ME8460-RAII-SRXB-Parks-004-2012-05-23 ME8460-RAII-SRXB-Parks-005-2012-05-23 ME8460-RAII-SRXB-Parks-006-2012-05-23 ME8460-RAII-SRXB-Parks-007-2012-05-23 ME8460-RAII-SRXB-Parks-008-2012-05-23 ME8460-RAII-DORL-Paige-009-2012-05-23 The tracking numbers are in the form:
[TAC number]-RAII-[Reviewing Technical Branch]-[Reviewer-sequence #]-[Request-by date expressed as year-month-day]
- 1. (ME8460-RAII-SRXB-Parks-001-2012-05-23) Please explain how the 10 CFR 50.46(a)(3) error report enclosed in your response to the NRCs Information Request pursuant to 10 CFR 50.54(f) remains adherent to the WCAP-14449-P-A methodology, which includes a supplement describing the method for fulfilling 10 CFR 50.46(a)(3) re-analysis requirements.
3
- 2. (ME8460-RAII-SRXB-Parks-002-2012-05-23) Justify the evaluation of reduced peaking factors at beginning-of-life conditions to obtain analytic margin to offset the TCD effect. Show that peaking factor reductions affect PCT in a manner that is substantially independent of fuel burnup.
- 3. (ME8460-RAII-SRXB-Parks-003-2012-05-23) Fully explain all peaking factor adjustments and provide the rationale for each adjustment.
- 4. (ME8460-RAII-SRXB-Parks-004-2012-05-23) Compare the results of the TCD and offset sensitivity studies to the fuel rod parameter sensitivity studies discussed in the Code Qualification Document.
Please explain any significant discrepancies in the results.
- 5. (ME8460-RAII-SRXB-Parks-005-2012-05-23) Your submittal referenced a March 7, 2012 letter sent by Westinghouse Electric Company to the NRC.
a) The final paragraph on Page 2 of 9 refers to small differences in fuel characteristics that were claimed to be compared. The paragraph also discusses confirmatory evaluations concluding that other operating characteristics were acceptable. Provide the results of this comparison for Kewaunee, including the relevant conclusions and the technical basis supporting those conclusions.
For any conclusion that differences in a particular fuel or operating characteristic are offset by other conservatisms, list those conservatisms and provide a quantitative estimate of each conservatism, as well as a brief description of the rigor associated with that estimate.
b) Please provide the values for the coefficients used in the PAD 4.0+TCD UO2 thermal conductivity equation.
c) Please explain any error corrections, code improvements, and miscellaneous code cleanup between the WCOBRA/TRAC and HOTSPOT code versions used in the TCD evaluations and those used in the plants AOR.
d) What is the thermal conductivity model impact of code version changes in HOTSPOT?
- 6. (ME8460-RAII-SRXB-Parks-006-2012-05-23) Please provide additional detail concerning the steady-state initialization process. In particular, please explain what fuel characteristics are adjusted within the ASTRUM/CQD models to obtain convergence and agreement between HOTSPOT and PAD4.0TCD.
- 7. (ME8460-RAII-SRXB-Parks-007-2012-05-23) Please explain how the changed design values will be verified during operation of the plant, i.e. TS limits, Surveillances, etc. Also, explain what compensatory actions will be taken if a value is found to be outside of the limits assumed in the analysis.
- 8. (ME8460-RAII-SRXB-Parks-008-2012-05-23) Page 3 of Attachment 2 to Serial 12-100 states that Dominion and its vendor, Westinghouse Electric Company, LLC, utilize processes which ensure that LOCA analysis input values conservatively bound the as-operated plant values for those parameters.
Please explain these processes.
- 9. (ME8460-RAII-DORL-Paige-009-2012-05-23) Based on the NRCs review of the March 15,, 2012, submittal it appears that the licensee has revised inputs to a method of evaluation as described in the FSAR (as updated) used in establishing the design bases or in the safety analyses.
a) Address whether the methodology permits the licensee to establish how to select the value of an input parameter to yield adequately conservative results and whether the revised value is more conservative than that required by the selection method.
4
b) Further, address whether any of the changes (i.e., to the UO2 thermal conductivity equation) constitute a change in the calculational framework used for evaluating behavior or response of a system, structure or component.
5
Hearing Identifier: NRR_PMDA Email Number: 354 Mail Envelope Properties (Karl.Feintuch@nrc.gov20120502111100)
Subject:
ME8460 (successor to ME8205) - KEWAUNEE - 10 CFR 50.46, 30-DAY RESPONSE - RAI Conference Call - REPLACEMENT DRAFT ITEMS - Record of conference call Sent Date: 5/2/2012 11:11:07 AM Received Date: 5/2/2012 11:11:00 AM From: Feintuch, Karl Created By: Karl.Feintuch@nrc.gov Recipients:
"Feintuch, Karl" <Karl.Feintuch@nrc.gov>
Tracking Status: None Post Office:
Files Size Date & Time MESSAGE 11366 5/2/2012 11:11:00 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received: