ML20137R028

Summary of 970318 Meeting W/Fpl in Rockville,Md to Present Potential Success Path for EFW Flow & EDG Loading Concerns During SBLOCA Design Basis Scenario.List of Attendees & Handouts Encl

ML20137R028
Person / Time
Site:	Crystal River
Issue date:	04/07/1997
From:	Raghavan L NRC (Affiliation Not Assigned)
To:	NRC (Affiliation Not Assigned)
References
NUDOCS 9704140010
Download: ML20137R028 (35)

Text

April 7, 1997

-LICEN'SEE: Florida Power Corporation FACILITY: Crystal River Unit 3

SUMMARY

OF MEETING ON MARCH 18, 1997, REGARDING SOLUTION SET FOR EMERGENCY FEEDWATER AND EMERGENCY DIESEL GENERATOR LOADING PROBLEMS ,

On March 18, 1997, representatives of the Florida Power Corporation, licensee for Crystal River Nuclear Plant, Unit 3 (CR3) met with members of the staff at NRC Headquarters in Rockville, Maryland to present their potential success .

path for emergency feedwater (EFW) flow and emergency diesel generator (EDG) loading concerns during a small break loss of coolant accident (SBLOCA) design basis scenario. Enclosure 1 is a list of attendees. Enclosure 2 contains copies of handouts distributed at the meeting.

The licensee discussed the composition of the team that is involved in resolving the design concern. The licensee stated that the limiting scenario affecting the EFW and EDG operation is the SBLOCA, loss of offsite power (LOOP) and three limiting single failures. The licensee indicated that its established success objective is to maintain one high pressure injection (HPI) pump and EFW flow. The licensee presented details about various modifications and analyses that would be necessary to meet its established objective. The licensee also discussed its other long-term solutions including a diesel EFW pump or increased EDG capacity. ,

The staff questioned whether the licensee had considered the impact of other initiatives and corrective actions on the EFW/EDG resolution strategy. The licensee indicated that its team is generally aware of the other issues and does not expect them to affect the options discussed in the meeting. .

The meeting was informational in nature and did not represent the licensee's final solution to the EFW/EDG concerns. The licensee did not request, and the staff did not make a determination on the acceptability of the information presented in the meeting. The licensee expects to finalize its position and

raake appropriate submittals to the staff soon. 1 Original signed by L. Raghavan, Project Manager Project Directorate II-3 O\

Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation '

Docket No. 50-302

Enclosures:

1. Attendance List

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2. Meeting Handout See next page me m CMS COPY T .

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Enclosures:

Document Name: G:\ CRYSTAL \970318. SUM l OFFICE Poll 3/PM _

l PDil 3/LA , y l PDIl 3/D , T lC l f MME LRaghaven W/ BCtayton /) /1R

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FHebdon H DATE 04/ h /97 04/ 4 /97 04/ 7 /97 OfflCIAL RECORD COPY 9704140010 970407 PDR ADOCK0500g2

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StM1ARY OF-MEETING ON MARCH 18, 1997, REGARDING SOLUTION SET FOR EMERGENCY FEEDWATER  !

AND EMERGENCY. DIESEL GENERATOR LOADING PROBLEMS Distribution: I HARD COPY w/ Enclosures 1 and I  !

.' d Docket: File . l

~PUBLIC t,. l Crystal-River Reading ' i OGC _ j ACRS E-Mail w/ Enclosure 1 S. Collins /F Miraglia (SJC1,FJM)  !

R. Zimmerman (RPZ)

S. Varga (SAV,RCN)

J. Zwolinski (JAZ) )

F. Hebdon (FJH) '

L. Raghavan (LXRI)

8. Clayton (BAC2)

R. Shin (RPS)

D. Ross (SAM)

J. Jaudon (JPJ)

H. Cristensen (H0C)

W. Rogers (WGRI)

F. Orr (FR0)

B. LeFave (WTLI)

0. Chopra (OPC)

M. Pratt (MPP)

S. Sanchez (SPS)

D. Thatcher (DFT)

S. Saba (SNS1)

J. Lyons (JEL)

G. Tracy (GMT)

S.Johnson, J. Cahill (SJC2)

RII (URU)

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. CRYSTAL RIVER 3 MEETING l MARCH 18, 1997 l

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_r, r r _m n m a m rn m m m m m__n_rt re_n r-l FPC / NRC TECHNICAL MEETING AGENDA March 18,1997 Meeting Purpose Brian Gutherman EFW Startup Team John Holden ECCS/EFW Systems Fran Sullivan ,

Problem Statement Fran Sullivan Cycle 11 Modifications Fran Sullivan Solution Set Flow Paths Mark Van Sicklen Earnie Gallion Paul Fleming Jeff Seals (Framatome)

Licensing Perspective Brian Gutherman Operations Management Ron Davis Perspective Summary John Holden

, MEETING PLRPOSE l

Communicate Technical Information On 1

CR-3 EFW and EDG Loading During Small Break LOCA Mitigation Discuss the CR-3 Startup Team Mission Discuss the Solution Sets Supporting a Safe Startup Provide a Summary of The Regulatory l Actions Required

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,ft STARTUP TEAM

...s To find a resolution, based on the Team Charter: EDG / EFW Dependency Team results, to allow CR-3 to Startup Safely.

Management Fran Sullivan Ron Davis Sponsors:

Team Leader: Mark Van Sicklen Team Members: Bill Marshall Paul Fleming Chris Doyel Garrett Hebb Al Friend Mark Liebmann Earnie Gallion Jeff Seals (FTI)

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STARTUP TEAM First Team Identified EDG Margin Concerns On December 18th Recommended 3 Options Second Team Identified Concerns with Startup 1 Complexity of TS Changes Cross-Train Dependencies Importance of EFW for SBLOCA Impact of 3 Limiting Single Failures

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STARTUP TEAM cont'd

- Startup Team - How Can CR-3 Startup Safely?

Design EOP Success Paths

No Unreviewed Safety Questions Accurate Design and Licensing Basis No Exemptions from the Regulations Defense In Depth Integrated Safety Assessment

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STARTUP TEAM (cont'd; What is Different with This Approach?

>> Inter-disciplinary Team

- Engineering / Operations / Licensing NSSS Supplier On Site Participation Team Members Challenge Each Other Management Oversight Cycle 11/ Cycle 12

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EFW / ECCS SYSTEMS Makeup and Purification / HPI Decay Heat Removal / LPI Emergency Feedwater / EFIC Auxiliary Feedwater (Pump)

Emergency Diesel Generators I

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PROBLEM STATEMENT I

'A' EDG Design Margin History Issues EDG Loading Cross Train Dependencies

>> Single Failures Emergency Feedwater XPSH

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THE TEAM REVIEWED FSAR CHAPTER 14 ACCIDENTS.

THE LIMITING TRANSIENTS AFFECTING THE EMERGENCY DIESEL GENERATOR LOADING AND -

- EMERGENCY FEEDWATER WERE IDENTIFIED AS:

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AND 3 LIMITING SINGLE FAILURES O

LIMITING SINGLE FAILURES LOBA o_r LOBB - Loss of a Battery

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• Disables ONE Train of Emergency Core Cooling

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LOSS OF COOLANT ACCIDENT SIZES 36" Inside Diameter (7.07 ft2) ,

LBLOCA DOES NOT REQUIRE HPI

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DOES NOT REQUIRE EFW 9.6" inside Diameter (0.5 ft2)

/ SBLOCA

/ HPI IS REQUIRED e DOES NOT REQUIRE EFW

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EFW IS REQUIRED FOR A LIMITED TIME 2.7" Inside Diameter (0.04 ft2)

With 1 HPI Pump EFW IS REQUIRED

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RCS' PRESSURE RESPONSE TO A SMALL BREAK LOCA 3000 i

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SOLUTION SET FLOW PATHS Address Each Single Failure Scenario Separately Identify Design Basis Success Path _

Identify Challenges Identify Defense In Depth Identify Needs

- Modifications

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- Licensing Actions

- Training

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3 LIMITING SINGLE FAILURES I

LOBA  ?

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LICENSING PERSPECTIVE l

2 Team Members with Licensing Experience Needs Integrated with Other Plant Efforts TS Changes USQs FSAR/TS Bases This Is a Safe Approach TS Changes Must Address Applicable Dependencies Must Comply with Regulations NRC Communication a Key

OPERATIONS MANAGEMENT PERSPECTIVE .

l Operator Burden

Defense In Depth EOP Impact Integrated Team

CYCLE 11 RESTART CYCLE 12 New Isolation Criteria u HPI Cavitating Ventures Crosstie EFP-2 / ASV-204 Diesel EFW Pump 150 KW EDG Upgrade l or Load Management Increase EDG Capacity l Analyze EFP-2 EFW Cavitating Ventures FWP-7 Diesel Powered EFIC Improvements i

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