ML16202A058
| ML16202A058 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 07/27/2016 |
| From: | Bhalchandra Vaidya Plant Licensing Branch III |
| To: | Exelon Generation Co |
| Vaidya B | |
| References | |
| CAC MF8063, CAC MF8064 | |
| Download: ML16202A058 (4) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 27, 2016 LICENSEE: La Salle County Station FACILITY: La Salle County Station, Units 1 and 2
SUBJECT:
SUMMARY
OF JULY 15, 2016, MEETING WITH LA SALLE COUNTY STATION, UNITS 1 AND 2, ON PRE-APPLICATION FOR AMENDMENT REGARDING SUPPRESSION POOL SWELL (CAC NOS. MF8063 AND MF8064)
On July 15, 2016, a Category 1 public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of La Salle County Station, Units 1 and 2 (the Licensee), at NRC Headquarters, One [Two] White Flint North, 11555 [11545] Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discuss the licensee's plan to submit the application for Amendment to the Facility Operating Licenses Regarding revision of its Suppression Pool Swell Design Analysis. The meeting notice and agenda, dated July 1, 2016, are available in the Agencywide Documents Access and Management System (ADAMS) at Accession No. ML16195A480. A list of attendees is provided as Enclosure 1.
The licensee presented information (See ADAMS Accession No. ML16194A006}. The presentation discussed the following aspects of the issues related to the current analysis of suppression pool swell and the licensee's plans to address them in its license amendment request:
- Background of Suppression Pool Swell Phenomena, Design Analysis
- Overview of the Issues: Non-Conservatism in assumption of mass and energy release, its Operability Evaluation OE 12-003, Consequences of correcting the non-conservatism
- Need for the amendment, and
- Technical evaluation topics to be addressed in the amendment request The NRC staff queried the licensee about the following areas:
- Details about the historical background including the evolution of the Analysis assumptions, methods, models etc., and
- Generic implication of the phenomena and the issues to other plants The NRC staff indicated that the amendment request, as a minimum, should address the following areas:
- Lessons learned from other plans (e.g., Columbia and NMP-2)
- Provide detailed history of background, errors
- How does the analysis of record (AOR) comply with the requirements? I How will the new analysis comply with the requirements?
- Include methodology details - provide table comparing AOR to new analysis. What has been changed/not changed? For the changes, justify why the changes still meet the requirements.
- Include a description of the methodologies (e.g., computer codes PSAM, PCSIM)
- If any conclusions were previously approved by NRC, clearly cite them.
- Justify the assumptions used.
- Explain why LaSalle won't require structural changes
- Where conservatisms are changed (introduced or reduced) and why is that acceptable?
- For drywell pressure response (computer code M3CPT), this will be limiting response (Maximize mass and Energy (M&E), initial temperature, pressure, humidity (20%)), Provide all inputs/conditions for limiting response, Input Assumptions (even if same as peak pressure response).
- Describe the impact of changes to other systems (or other analyses)
- Clarify why this change is unique to LaSalle No members of the public attended. Public Meeting Feedback forms were not received.
Please direct any inquiries to me at 301-415-3308, or Bhalchandra.vaidya@nrc.gov.
Bhalchandra K. Vaidya, Project Manager Plant Licensing Branch LPL3-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-373 and 50-37 4
Enclosure:
List of Attendees cc w/encls: Distribution via Listserv
LIST OF ATTENDEES FOR PRE-APPLICATION MEETING WITH EXELON CORPORATION, REGARING LICENSE AMENDMENT REQUEST WITH RESPECT TO SUPPRESSION POOL SWELL SUBMISSION La Salle COUNTY STATION UNITS 1AND2 JULY 15. 2016 NAME TITLE ORGANIZATION & CONTACT INFORMATION B. K. VAIDYA LICENSING PROJECT MANAGER NRR/DORL/LPL3-2 RUSS HASKELL LICENSING PROJECT MANAGER NRR/DORL/LPL3-2 VIKRAM SHAH DEPUTY ENGG. DIRECTOR EXELON CORP/LaSalle GUY FORD REGULATORY ASSURANCE MGR. EXELON CORP/LaSalle MATT CHOUINARD DESIGN ENGINEER EXELON CORP/LaSalle JAMES PATTERSON DESIGN ENGINEER EXELON CORP/LaSalle LISA SIMPSON CORPORATE LICENSING ENGINEER EXELON CORP/Cantera LI GUANGJUIN ENGINEER GEH SAUL MINTS PRINCIPLE ENGINEER GEH (VIA TELEPHONE)
THOMAS STODDARD TECHNICAL LEADER GEH (VIA TELEPHONE)
JOHN ROBBINS RESIDENT INSPECTOR NRC/ LaSalle (VIA TELEPHONE)
ROBERT RUIZ SENIOR RESIDENT INSPECTOR NRC/ LaSalle (VIA TELEPHONE)
ED MILLER LICENSING PROJECT MANAGER/ACTING NRR/DORL/LPL3-2 BRANCH CHIEF AHSAN SALLMAN SENIOR REACTOR SYSTEMS ENGINEER NRR/DSS/SRXB NAGESWARA KARIPINENI REACTOR SYSTEMS ENGINEER NRR/DSS/SCVB Enclosure
r s Mee mg ummary: ML16202A058 Mee f mg No rice: ML16195A480 Han d ou ts ML16194A006 OFFICE NRR/DORL/LPL3-2/PM NRR/DORL/LPL3-2/LA N RR/DORL/LPL3-2/BC(A) NRR/DORL/LPL3-2PM NAME BVaidya SRohrer GE Miller BVaidya DATE 7/26/16 7/26/16 7/27/16 7/27/16