ML17055D197

Summary of 870818 Meeting W/Util & Other Listed Companies Re Drawdown Time Calculations & Recent Amend Request to Revise Svc Water Temp to 81 F.Handout Supplied by Util & List of Meeting Attendees Encl

ML17055D197
Person / Time
Site:	Nine Mile Point
Issue date:	09/01/1987
From:	Haughey M Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8709100380
Download: ML17055D197 (28)

Text

September 1,

Docket No. 50-410 Niagara Mohawk Power Corporation LICENSEE:

FACILITY:

SUBJECT:

DISTRIBUTION NRCPDR Local PDR PDI-I Rdg.

Nine Mile Point Unit 2 MHaughey R. Capra

SUMMARY

OF MEETING HELD ON AUGUST 18, 1987 WITH NIAGARA MOHAWK POWER CORPORATION (NMPC)

OGC JCraig EJordan JPartlow ACRS(10)

BClayton

JJohnson, RI'Neighbors RGoel JKudrick On August 18, 1987 the NRC staff met with representatives of NMPC to discuss drawdown time calculations for Nine Mile Point Unit 2 (NMP-2).

NMPC had recently determined that the original calculations to determine drawdown time for NMP-2, which assumed loss of offsite power, did not represent the worst case condition.

At the meeting, NMPC presented the results of the revised, more conservative calculations.

The new analysis applies to the first cycle of operation only.

The analysis for operation beyond the first cycle will be completed at a later date.

NMPC has performed the new analysis under the provisions of 10 CFR 50.59.

If the NRC staff determines that this is not an unreviewed safety issue, and therefore not covered by the provisions of 10 CFR 50.59, the licensee will be informed.

Because NMPC intends to operate NMP-2 under restrictions more stringent than those presently in the Technical Specifications in order to be bounded by the new analysis, NMPC is not proposing a change to the Technical Specifications.

In addition to the discussions concerning the revised drawdown time, the recent amendment request to revise the allowable service water temperature to 81'F was discussed.

The licensee agreed to provide additional information concerning (I) procedures to be used to bring the third closed loop cooling water (CCP) heat exchanger on line when needed; (2) procedures concerning radwaste loads in the turbine area; and (3) what was involved in reducing the K factors.

Enclosure 1 contains a copy of the handout supplied by NMPC during the meeting.

Enclosure 2 contains a list of meeting attendees.

Enclosures:

As stated cc:

See ext page MHaughey Gf/I /87 8709100380 870901l PDR ADOCN, 05000410 P'

PDR Mary F. Haughey, Project Manager Project Directorate I-l Division of Reactor Projects, I/II

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Mr. C.

V. Mangan Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Unit 2 CC:

Mr. Troy B. Conner, Jr.,

Esq.

Conner 5 Wetterhahn Suite 1050 1747 Pennsylvania

Avenue, N.W.

Washington, D.C.

20006 Richard Goldsmith Syracuse University College of Law E. I. White Hall Campus

Syracuse, New York 12223 Ezra I. Bialik

- Assistant Attorney General Environmental Protection Bureau New York State Department of Law 2 World Trade Center New York, New York 10047 Resident Inspector Nine Mile Point Nuclear Power Station P. 0.

Box 99

Lycoming, New York 13093 Mr. John W. Keib, Esq.

Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202 Mr. James Linvilie U.

S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Peter E. Francisco, Licensing Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202 Don Hill Niagara Mohawk Power Corporatior.

Suite 550 4520 East West Highway

Bethesda, Maryland 20814 Regional Administrator, Region I U.S. Nuclear Regulatory Co)mission 631 Park Avenue King of Prussia, Pennsylvania 19406 Mr. Paul D.

Eddy New York State Public Serice Commission Nine Mile Point Nuclear Station-Unit II P.O.

Box 63

Lycoming, New York 13093 Mr. Richard M. Kessel Chair and Executive Director State Consumer Protection Board 99 Washington Avenue

Albany, New York 12210

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TASK 1 - EFFECT OF INITIALVACUUM TASK 2 - MAXIMUMDRAWDOWN TIME TASK 3 - EFFECT OF INLEAKAGE-ANNULUS MODEL TASK 4 - COMPARISON OF ANNULUSVS. THREED MODEL TASK 5 - EFFECT OF INLEAKAGEAND DRAWDOWNTIME-THREED MODEL TASK 6 - CURRENT OPERATION LIMITATIONS

TASK 1 SRP CASE (LOCA + LOOP + DIV.Z600V BUS FAILURE)

SGTS FAN CAPACITY 4000 CF01 INLEAKAGE-3190 CFM t

NNULUS t MODEL INITIALVACUUM, IN W.G.

0

- 0.25

- 0.40 ET 16 16 16 DRAWDOWN TIME, SEC. 105 95 93

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0.0 0

z Iz

-0.25 z0O K

Oz0O

-0.50 10 100 1000 10000 100000 TIME AFTER LOCA (SECONDS}

.NNP2 FSAR FIGURE 6.2 76

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~

TASK 2 LOCATION CONTROL ROON DRAWDOWN TINE (SEC) 129 360 468 0.55 1,63" 2,16" 23.35 23.35" 23 '5" DOSE (REN)

DEPRESSURI ZATI ON NISCELLANEOUS TOTAL 23,90 24.98" 25.51" EAB 129 360 468 80 210" 289" 10 10 10 90 220" 299" "INTERPOLATED

TASK 3 REVISED SRP CASE (LOCA+

DIV. II 600V BUS FAILURE)(NO LOOP)

SGTS FAN CAPACITY 4000 CFN REVISED ~

ANNULUS IVIOD E T 25 20 19 15 14 INLEAKAGE-2400 CFM DRAWDOWNTIME, SEC. 120 140 148 202 640 INLEAKAGE-2800 CFM DRAWDOWN TIME, SEC. 127 158 170 2010 2340

0 ~

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TASK 4 DRAWDOWNTIME < 129 SEC.

SGTS FAN MPACITY - 4000 CFN FSAR QT SRP REVISED SRP IN LEAKAGE,CFM ANNULUS THREED ANNULUS THREED ANNULUS THREED 3190 2800 2400 2000 14 11.25 10 9

14 16 13 19 Is 12 14 11 17 75 16 10 11.5 9

17 25 14 8

16.75 12

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TASK 5A REVISED SRP CASE (LOCA+

DIV. II 600V BUS FAILURE}

SGTS FAN CAPACITY 4000 CFN INLEAKAGE-3190 CFM THREED MODEI4 E T 19 18 17 15 14 DRAWDOWN TIME, SEC.

1 I2 120 133 242 661

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0 O.

TASK 5B REVISED SRP CASE (LOCA +

DIV. II 600V BUS FAILURE)

SGTS FAN CAPACITY 4000 CFM INLEAKAGE-2800 CFM THREED MODE E T 17 16'5 12 g

11 DRAWDOWN TIME, SEC. 114 122 134 295 518 713

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TASK 5C REVISED SRP CASE (LOCA+

DIV. II 600V BUS FAILURE)

SGTS FAN CAPACITY --4000 CFN INLEAKAGE-2400 CFM THREED MODEL ET 14

.13 10 DRAWDOWN TIME, SEC. 124 135 223 306 424

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25 24 23 22 21 20 19 18 17 16 15 14 13 12 DELTATEMPERATURE VS. DELTA FLOW

~ REVISED SRP CASE

~ ADIABATICBOUNDARYCONDITION FOR SECONDARY CONTAINMENT

~ NO HEAT I.OAD AND EVAPORATION FROM THE SPENT FUEL POOL

~ CATHLIGHTSTRIPPEO OFF ON LOCA (SIGNAL)

~ ALLCATIUNITCOOLERS ON DIVISIONSILH(ARE OPERATING (STARTUP DELAY-60 SECONDS)

~ THE SGTS FAN CAPACITYIS 3700 CFM

~ THE SGTS FAN DELAY-30 SfCONDS

~ THE BUILDINGIS INITIALLYAT VACUUMCONDITIONS

~ THE ECCS PUMP AND HEAT EXCHANGER ROOMS ARE INITIALLYAT SERVICE WATER TEMPERATURE 9

8 7

6 5

400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 8 CALCULATED DELTA FLOW (SGTS MINUS INLEAKAGE)(CFM) i CALCULATED 10% MARGIN

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RESULTS OF SURVEILLANCE TEST N2-OSP-GTS-R001 PERFORMED 8/16/87 INITIALCONDITIONS:

SERVICE WATER TEMPERATURE 71.4 F

AMBIENT TEMPERATURE 83'F REFUEL FLOOR AVERAGE TEMPERATURE 98.9'F.

'UILDING 5, P AT START 0,25" W,C, TEST RESULTS:

STEADY STATE INLEAKAGE AT 0,45 IN, WC = 1880 CFM (CORRESPONDS TO 1500 CFM 8 -0.25 IN, WC)

ENCLOSURE 2

LIST OF MEETING ATTENDEES ON AUGUST 18, 1987 Name Mary Maughey Don Neighbors Rai Goel Jack Kudrick John Craig Don Hill Ed Klein M. K. Allen V. B. Patel M. S. Stocknoff Peter Francisco John E. Arthur Mark Wetterhahn Or anization NRC NRC NRC NRC NRC NMPC NHPC SWEC SWEC SWEC NMPC RG8E Conner 8 Wetterhahn

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