ML19331B921

Reactor Containment Bldg Integrated Leakage Rate Test at Fort Calhoun Station

ML19331B921
Person / Time
Site:	Fort Calhoun
Issue date:	06/11/1980
From:	Novgrod R, Purdy W, Rowley C NUCLEAR SERVICES CORP.
To:
Shared Package
ML19331B914	List: ML19331B913 ML19331B916 ML19331B921
References
NUDOCS 8008130534
Download: ML19331B921 (16)

Text

{{#Wiki_filter:3, \\ REACTOR CONTAINMENT BUILDING INTEGRATED LEAKAGE RATE TEST at FORT CALHOUN STATION e Prepared for: OMAHA PUBLit POWER DISTRICT ,.i NSC OPPD f 9,P

• Prepared by: ~

ffurdyI(/{df Oa f4 C Reviewed by: M. - f!N O

Novgrod, Da't e Date Appro'ved by:

h)- kU Rdwley g yry- ' Ga te F Jte Revised by: f' W.4,d u 6/// /M 16wlef Da'th' Date Prepared by: NUCLEAR SERVICES CORPORATION 2800 Center, Suite 897 2805 East Skelly Drive Tulsa, OK 74105 soosise 5 39

TABLE OF CONTENTS

1.0 INTRODUCTION

2.0 GENERAL DATA 3.0 TECHNICAL DATA 4.0 TEST DATA 5.0 VERIFICATION TEST 6.0 ANALYSIS AND INTERPRETATION 7.0

SUMMARY

OF EVENTS. ~ ~ ' ' j-Appendices: A Graphs for Type A Test Al Temperature vs. Time ~ A2 Pressure vs. Time A3 Dew Point vs. Time A4 Leakage Rate vs. Time. B Graphs for Verification Test B1 Temperature vs. Time B2 Pressure vs. Time B3 Dew Point vs. Time B4 Leakage Rate vs. Time 2 v-g

1.0 ' INTRODUCTION On February 2, 1980, the Fort Calhoun Power Station Unit I completed its second Integrated Containment Leakage Rate Test. The test was performed at 60 psig containment pressure and 74 F containment temperature. The Primary System was closed and being maintained at 110 F temperature. Nuclear Services Corporation was contracted to process and analyze the data obtained using its " LEAKER" computer program in Campbell, CA. .0g e r 9 4 O i l I L I 1

2.0 GENERAL DATA (a) Owner Omaha Public Power District (b) Docket No. 050-285 (c) Location Ft. Calhoun, NE (d) Containment Description Steel Lined Concrete with out-Side annulus ring (post-tensioned type building) (e) Date Test is Completed February 2, 1980 3.0 TECHNICAL DATA 3 6 (a) Containment net free volume (ft ) 1.05 x 10 (b) Design pressure (psig) 60 (c) Design Temperature (OF) 305 (d) Calculated Accident Peak Pressure limit, Pac (psig) 60 0 (e) Calculated Accident Peak Temperature (OF) 288 F ~ 4.0 TEST DATA (a) TestMethod(AbsoluteorReference) Absolute (b) Data Analysis Technique (Mass Point or Leakage Rate Point) Mass Point (c) TestPressure(s) 60 psig (a) Maximum allowable leakage rate (La)%24 hrs. .075 (e) Calculated leakage rate at upper con-fidencelimit(UCL) .0675 (f) Measured Leak Rate (Lam) .0634 1 5.0 VERIFICATION TESTS (a) Calibrated leak superimposed (%/24 hrs.) .0790 (b) Mass step change metered volume (%La) NA (c) Mass step change measure by Type A NA (d) Test instrumentation 30 RTD's 9 Dew Cells .2 Pressure-Detectors 2 L

4 6.0 ANALYSIS AND INTERPRETATION The second periodic Integrated Leakage Rate Test at the Ft. Calhoun Power Station was completed on February 2,1980, in accordance with Technical Specification Section 3.5 and 10 CFR appendix J. The absolute method was used in data analysis. The following penetrations were isolated from the 60 psig test pressure during the Type A test: Penetration Description Reason for isolation 11 CC Wtr to Nuclear Detector A Well Coolers 15 CC Wtr to Nuclear Detectoi-A Well Coolers 18 CC Wtr from RC Pump Lube Oil A Coolers 19 CC Wtr from RC Pump Lube Oil A Coolers 30 Hydrogh'n Purge B 39 CC Wtr Safety Injection Cooler A 52 Containment Pressure Signal C ~~ 53 CC Wtr Safety Injection Cooler A 57 Hydrogen Detection B 58 Rydrogen Detection B 69 Hydrogen Purge B 72 Containment Leak Test Supply Air D A To reduce the possibility of chromate leakage and processing of chromates in the waste disposal system - B Valve blocked during test - LLRT performed to verify leakage rate C' . Test instrument connection D Used for pressurization 3 m

After completion of the type A test, the lines were tested for local leakage (type C test). The combined leakage rate for these lines was observed to be.0015% by wt/ day (1538 SCCM). 1538 14.7 (1.05 x 10 )(12.x 2.54)3

• U x 24 x 60 x 100% =.0015 wt%/ day 6

The leakage measured (Lam) during the type A test was.0634 weight %/ day at the 60 psig test pressure. Total corrected leakage (.0634 +.0015 wt%/ day) was equal to.0649 wt%/ day which is within technical specification acceptance criteria of.075 (.75La) percent of the contained air by weight in 24 hours. The verification test was conducted by inducing a measured leak of .079 weight %/ day. The composite leakage rate was found to be.1203 weight %/ day. Lo + Lam .025 i Lc 5 Lo + Lam _.025 .0790 +.0634 .025 s.1203 s.790 +.0634 +.025 .1174 1.1203 5.1274 Lo = induced leakage rate Lam = measured leakage Type A test Lc = composite leakage rate As shown above the leakage rate for the verification test (Lam) was within the technical specification requirement of.025 weight %/ day (.25La). 7.0

SUMMARY

OF EVENTS There were no penetrations repaired prior to the Type A test. 4

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