ML15198A343

2015/06/22 Pre-Submittal Teleconference Meeting Slides: LOCA Analyses Supporting MPS2 Upgrade to Areva Standard CE14 Htp Fuel Assembly

ML15198A343
Person / Time
Site:	Millstone
Issue date:	06/22/2015
From:	Craft W Dominion, Dominion Nuclear Connecticut
To:	Richard Guzman Plant Licensing Branch 1
Guzman R
References
Download: ML15198A343 (14)

Text

Pre-Submittal P S b itt l Teleconference T l f for LOCA Analyses Supporting Millstone Power Station, Unit 2 Upgrade pg to AREVA Standard CE14 HTP Fuel Assembly Junee 22,, 2015 Ju 0 5

Agenda

1) Background on fuel product upgrade at Millstone Power Station Unit 2 (MPS2)

2) Licensing Li i overviewi for f fuel f l product d t upgrade d

3) License Amendments for LOCA Analyses

• Small Break Loss of Coolant Accident (SBLOCA)

• Large Break Loss of Coolant Accident (LBLOCA) 4)) Licensing ce s g ttimeline/schedule e e/sc edu e

5) Future Dominion/NRC interactions Pg. 2

Background on Fuel Product Upgrade

• Kickoff meeting with NRC was July 17, 2013 (ADAMS ML13207A259)

• Goal is to implement the change for Cycle 25 (Spring 2017)

• Upgrade pg fuel p product is called the AREVA Standard CE14 HTP Fuel Assembly

• Upgrades pg to the current MPS2 fuel p product:

- M5 cladding

- Advanced fuel rod geometry Zircaloy-44 MONOBLOC' guide tubes

- Zircaloy Pg. 3

Licensing Overview

• Dominion identified 2 required submittals:

- M5 LAR and Exemption Request

• Exemption Request approved on May 12, 2015

• Amendment approved on May 18, 2015

- LAR to add RLBLOCA topical report to MPS2 TS 6.9.1.8 (list of analytical methods used to determine COLR limits)

• Statement made to NRC in a Dominion letter dated November 1, 2012 regarding SBLOCA:

- A reanalysis of the SBLOCA event will be submitted within one year of NRC approval of Supplement 1 to the AREVA SBLOCA methodology

- NRC reiterated in Sleicher-Rouse Closure Evaluation dated July 18, 2013

• To address above statement, SBLOCA LAR will upgrade EM to Supplement 1 of EMF-2328(P)(A)

Pg. 4

SBLOCA Analysis

• Analysis completed using EMF-2328(P)(A) including Supplement 1

- Analysis conforms to draft NRC safety evaluation

- Change to TS 6.9.1.8 will add Supplement 1 to Reference 5

- LAR will omit revision number and vendor names to avoid confusion

- Dominion plans to submit LAR in July 2015 (more schedule discussion later))

- Dominion seeks NRC feedback on referencing the draft SE Pg. 5

SBLOCA Analysis

• Analysis of Record (AOR) presented in the LAR was performed for fuel product with M5 cladding

- Assessment performed for full core of the fuel product with Zr-4 cladding to develop PCT for comparison to the AOR (fuel product with M5 cladding)

- PCT difference will be maintained as a 10 CFR 50.46 estimate until fuel product p

with Zr-4 cladding is non-limiting

- Addressing the fuel product with Zr-4 cladding explicitly supports implementation oof tthee LAR with w t SBLOCA S OC EM Supp Supplement e e t 1 soo soon aafter te NNRC C app approval ova

• No need to wait for fuel product with M5 cladding introduction in 2017

- Dominion prefers this approach as the AOR represents the M5 clad fuel configuration fi ti th thatt will ill be b usedd for f compliance li with ith 50.46c 50 46

- Dominion seeks NRC feedback on this approach Pg. 6

SBLOCA Analysis

• SBLOCA LAR will incorporate Supplement 1 of EMF-92-116(P)(A)

- RODEX used to develop fuel rod inputs for SBLOCA analysis

- Change g to TS 6.9.1.8 will add Supplement pp 1 to Reference 16

- LAR will remove the revision number and omit vendor names to avoid confusion Pg. 7

LBLOCA Analysis

• Analysis completed using EMF-2103(P)

EMF 2103(P) Revision 3

- Analysis is in progress and is being performed in accordance with the submitted EM as modified by the AREVA RAI responses

- AREVA engineering products for MPS2 will be completed after affirmation from NRC that RAI responses from January 2015 are acceptable

- LAR A willill be b submitted b i d after f reviewi off the h ddraft f NRC C SE S to ensure conformance f

- Analysis does not apply to the fuel product with Zr-4 cladding. Implementation of the LAR will be requested for the Spring 2017 refueling outage with first use of the fuel product with M5 cladding

- Fuel product with Zr-4 cladding will be addressed for mixed cores

- Dominion seeks NRC feedback on referencing the draft SE in the LAR Pg. 8

Licensing timeline/schedule

• Need LOCA Analysis LARs approved by October 2016

• Supports M5 Cladding for Cycle 25 (Spring 2017)

• SBLOCA schedule has delayed 10 months from the initial project schedule presented in July 2013

- Planned l d submittal b i l date d still ill allows ll for f 12 monthh NRC review i off the h LAR

• LBLOCA schedule has delayed at least 6 months from the initial project schedule presented in July 2013

- Planned submittal date still allows for 12 month NRC review of the LAR with minimal schedule float Pg. 9

SBLOCA Licensing timeline/schedule Pg. 10

LBLOCA Licensing timeline/schedule Pg. 11

Future Dominion/NRC Interactions

• Implementation of the fuel product upgrade at MPS2 for Cycle 25 in Spring 2017 relies on the schedule presented

• LAR with SBLOCA analysis to be submitted in July 2015 with reference to draft SE

• LAR with LBLOCA analysis to be submitted in September 2015 with reference to draft SE

- Schedule depends on NRC agreement with AREVA RAI responses

• Potential re-work of AREVA engineering products for MPS2 Pg. 12

Discussion Pg. 13

Acronym List

• AOR Analysis of Record

• CFR Code of Federal Regulations

• COLR Core Operating Limits Report

• EM Evaluation Model

• HTP High Thermal Performance

• LAR License Amendment Request

• LBLOCA Large Break Loss of Coolant Accident

• LOCA Loss of Coolant Accident

• MPS2 Millstone Power Station, Unit 2

• RAI Request for Additional Information

• RLBLOCA Realistic Large Break Loss of Coolant Accident

• SBLOCA Small Break Loss of Coolant Accident

• SE Safety Evaluation

• TS Technical Specifications Pg. 14