ML20154D673

Summary of 880425 Meeting W/Util to Discuss Licensee Plans to Provide Continuous Display of Certain SPDS Variables. List of Attendees & Util Presentation Encl

ML20154D673
Person / Time
Site:	Millstone
Issue date:	05/12/1988
From:	Ferguson R Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
TAC-65805, NUDOCS 8805190289
Download: ML20154D673 (16)

Text

. . _ .

MAY.12 %

Docket No. 50-423 LICENSEE: Northeast Nuclear Energy Company (NNECo)

FACILITY: Millstone Nuclear Power Station, Unit 3

SUMMARY

OF MEETING TO DISCUSS THE SAFETY PARAMETER DISPLAY SYSTEM (SPDS)(TACN0.65805)

On April 25, 1988, representatives of the staff and NNECo met to discuss the NNECo's plan to provide a continuous display of certain SPDS variables, i.e.,

Containment Hydrogen Concentration and Post-LOCA Cooling Variables. The highlights of the discussion are summarized as follows:

1. A containment hydrogen (H2) status display will be added to the Containment Status Tree (CST); however, it will be independent of the existing CST. The H2 display will be either green or yellow status when the containment hydrogen concentration is greater than r.%. The yellow status will indicate on tFe top level containment display.

2. A post LOCA top level display wi ! be added. The Radiation Release and Post LOCA display will' share the space now used for the Radiation Release top level display. A Post LOCA cooling status tree will be added. The tree will terminate in green or yellow status. The yellow status will indicate on the top level display.

Enclosure 1 includes a list of attendees and the NNECo's presentation.

'M W W Robert L. Ferguson, Project Manager l Project Directorate I-4 Division of Reactor Projects I/II

Enclosure:

l As stated I cc w/ enclosure:

See next page DISTRIBUTION o Docket File: EJordan i NRC & Locla PDRs JPartlow '

JStolz NRC Participants RFerguson ACRS(10)

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, Mr. E. J. Mrocz ka Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit No. 3 cc:

Gerald Garfield, Esquire R. M. Kacich, Manager Day, Berry and Howard Generation Facilities Licensing Counselors at law Northeast Utilities Service Company City Place Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 W. D. Romberg, Vice President D. O. Nordquist Nuclear Operations Manager of Quality Assurance Northeast Utilities Service Company Northeast Nuclear Energy Company Post Office Box 270 Post Office Box 270 Hartford, Connecticut 06141-0270 Hartford, Connecticut 06141-0270 t

Kevin McCarthy, Director Regional Administrator i Radiation Control Unit Region I Department of Environmental Protection U. S. Nuclear Regulatory Commission State Office Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 Bradford S. Chase, Under Secretary First Selectmen Energy Division Town of Waterford Office of Policy and Management Hall of Records 80 hashington Street 200 Boston Post Road Hartford, Connecticut 06106 Waterford, Connecticut 06385 S. E. Scace, Station Superintendent W. J. Raymond, Resident Inspector Hillstone Nuclear Power Station Millstone Nuclear Power Station Northeast Nuclear Energy Company c/o U. S. Nuclear Regulatory Commission Post Office Box 128 Post Office Box 811 Waterford, Connecticut 06385 Niantic, Connecticut 06357 C. H. Clement, Unit Superintendent M. R. Scully, Executive Director Millstone Unit No. 3 Connecticut Municipal Electric Northeast Nuclear Energy Company Energy Cooperative Post Office Box 128 268 Thomas Road l Waterford, Connecticut 06385 Groton, Connecticut 06340 1 Ms. Jane Spector Michael L. Jones, Manager Federal Energy Regulatory Connission Project Management Department 825 N. Capitol Street, N.E. Massachusetts Municipal Wholesale Room 8608C Electric Company {

Washington, D.C. 20426 Post Office Box 426 i Ludlow, Massachusetts 01056 Burlington Electric Department  !

c/o Robert E. Fletcher, Esq.

271 South Union Street Burlington, Vermont 05402 i i

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, Enclosure 1 l SAFETY PARAMETER DISPLAY SYSTEM MEETING ATTENDANCE LIST Names ORGANIZATION R. L. Ferguson NRR h

F. R. Orr NRR Joel Kramer NRR/HFAB R. G. Joshi NU Licensing Davis McDaniel Millstone 3 Engineering Keith Jensen Millstone 3 Engineering 1

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MILLSTONE UNIT 3 NRC/NNECO MEETING ON SPDS APRIL 25,1988 i

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Location: White Flint Building, Room # 14B13 Rockville, Maryland l

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i Agenda Introduction

• Discussion on the Results of Evaluation Regarding j

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- Containment Hydrogen Concentration j - Post-Loca Cooling Variables i

l Implementation Schedule Conclusions I

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l SPDS TOP LEVEL DISPLAY s.

l, i SUB CORE HEAT RCS CTMT RCS RAD REL l CRIT COOL SINK INTEG INVN POST LOCA I

1 THIS IS THE NORMAL " TOP LEVEL " DISPLAY l AT THE BOTTOM OF THE SCREEN l

" POST LOCA " HAS BEEN ADDED TO THE

" R AD REL" BOX

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CTMT

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l STATUS TREE i

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A CTMT HYDROGEN STATUS DISPLAY WILL BE ADDED TO -

i THE TREE (SEE NEXT PAGE)

THE H 2 DISPLAY WILL NOT "TIE IN" TO THE EXISTING TREE ,

i THE H 2 DISPLAY WILL BE EITHER GREEN OR YELLOW ,

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YELLOW STATUS WHEN CTMT H2 CONCENTRATION > X%

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YELLOW STATUS WILL DIRECT OPERATORS TO FR-Z.1 ,

j ("RESPONSE TO HIGH CTMT PRESSURE")

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YELLOW STATUS WILL INDICATE ON TOP LEVEL DISPLAY

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CTHT RAD SUHF LVL : { , Q, y FT EELQH 10 R/HR CTMT RAD :Q,Q R/HR m

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i CTMT SENSOR DATA THIS DISPLAY WILL NOT CHANGE (SEE NEXT PAGE) l e

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_____ ___. - . . _ _ . _ _ _ _ . _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ __ _ _ _ m __

CTMT SENSOR DATA CTMT PRES (Psia)

NARROW RANGE DATA SENSOR 10 LMS P934 10 P935 10 P936 10 P937 WIDE RANGE .

DATA SENSOR 10 LMS P24A 10 P248 CTMT SUMP LVL (FT)

DATA SENSOR 1.02 RSS L22A1 1.05 L2281 CTMT RAD (RIHR)

DATA SENSOR 1.1 RMS RE04 1.1 RE05 e .

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CONTAINMENT HYDROGEN i

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THIS DISPLAY WILL NOT CHANGE (SEE NEXT PAGE) i l

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CONTA!NMENT HYDROGEN 4

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! CONTAINMENT H2 % TRAIN A 0.00969 l CONTAINMENT H2 % TRAIN B 0.01469 4

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RADIATION RELEASE / POST LOCA COOLING MENU i

m i POST LOCA POST LOCA RAD REL RAD RR

' COOLING l COOLING CSF STATUS TREE CSF STATUS TREE

. STATUS TREE VARIABLES STATUS TREE VARIABLES i

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ACCESSED BY " RAD REL / POST LOCA " KEY j

PLC KEYS HAVE BEEN ADDED 1

RAD REL KEYS HAVE BEEN REWORDED l .

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POST LOCA COOLING STATUS TREE WILL AUTO INITIATE BASED ON RWST LEVEL AND CTMT SUMP LEVEL

- LOGIC NOT FINAL, BUT DECISION PARAMETERS WILL LIKELY BE RWST LEVEL

• CTMT SUMP LEVEL

• RSS PUMP BREAKER STATUS RSS DISCHARGE PRESSURE

• SWP FLOW TO RSS HEX TREE WILL TERMINATE IN GREEN OR YELLOW STATUS

' YELLOW' STATUS WILL DIRECT OPERATORS TO ES-1.3

( "TRANSFER TO COLD LEG RECIRC" )

' YELLOW' STATUS WILL INDICATE ON TOP LEVEL DISPLAY

e POST LOCA COOLING SENSOR DATA WILL INCLUDE ALL THE ALREADY EXISTING PARAMETERS ON THE CURRENT PLC DISPLAY (SEE NEXT PAGE)

MORE PARAMETERS WILL BE ADDED THE CURRENT PLC DISPLAY WILL BE REMOVED FROM CORE COOLING O

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