ML20087D740

Forwards Results of Secondary Containment Leak Rate Test 8.7.3 Performed on 831213 to Verify Integrity of Containment at Refueling Outage 6 Prior to Refuel.Results Satisfactory

ML20087D740
Person / Time
Site:	Pilgrim
Issue date:	03/07/1984
From:	Harrington W BOSTON EDISON CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM), Office of Nuclear Reactor Regulation
References
BECO-LTR#84-038, BECO-LTR#84-38, NUDOCS 8403140107
Download: ML20087D740 (4)

Text

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D BOSTON EDISON COMPANY GOD BovLsTON STREET BOSTON, M ASEACHUB ETTs 02199 WILLIAM O. HARRINGTON

• • ";""," ""'""' BECo Ltr. #84-038 Director of Nuclear Reactor Regulation (12) c/o Distribution Services Branch Attention

    Document Distribution Center Administrator U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Docket No. 50-293 License No. DPR-35 subject: Secondary Containment Leak Rate Test Report

Dear Sir:

A Secondary Containment Leak Rate Test (8.7.3) was satisfactorily performed on December 13, 1983 and !s hereby reported as required by PNPS Technical Specification 6.9.C.3. This test was performed to verify secondary containment integrity ai Refueling Outaga #6 prior to refuel .

This secondary containment teak rete test demonstrcted that the Standby Gas Treatment System (SGTS) was capable of maintaining greater than 4 inch of water vacuum in the secondary containment, as required by PNPS Technical Specification 4.7.C.l.c.

The test was initiated through the use of permanently installed test switches which simultaneously isolated the normal secondary containment ventilation system and initiated the Standby Gas Treatment System.

Review and approval by the Boston Edison Company's Nuclear Engineering Department of the acceptance criteria of this test ensures that satisfactory results f rom its performance verifles the integrity of secondary containment.

The data obtained during the test is enclosed.

Very trul,y yours, 1

Wililam D. Harrington PFG: caw Attachment Courtesy Copy to: Director, inspection and Enforcement Region i U.S. Nuclear Regulatory Commission J

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8403140107 840307 b dg PDR ADOCK 05000293 \

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Sacondary Containment Lask Rate Signoff Attachment A A. Prerequisites (Etep IV)

( 1. Watch Engineer permissihn to perform test Initial KT

2. Turbine Building, H&V System operating arb .03" do BWC on operating floor and W.04" in condenser compartment. Initial

3. DP-A-22 and DP-A-32 calibrated Initial BWC

4. At least one door at each access closed Initial 3WC

5. Standby gas treatment system operable Initial BNC

6. All automatic ventilation system isolation dampers operable or secured in the isolated condition Initial BWC

7. All manometers filled and zeroed Initial BWC

8. Secondary containment checkoff (Attachment B) complete Initial PDS

9. Reactor Building' Truck Lock doore cycled. Initial BWC

- 10. Specific purpose for test performa.v.a To demonstrate integrity of Secondary Containment at Refu-iinq Outage #6 prior to ref uel . Purpose B. Test Performance Wind Direction 450 Wind Velocity I4 mph Barometric Pressure 29.62 "Hg Outside Temperature 53 'F Inside Temperature 68 *F 'Y

1. Base Readings (Step 4)

Manometer A P Rx Bldg El 91' .

N (1) +.08 "HO2 E (2) +.04 "H0 4 W (3) +.08 "HO 2 S (4) +.07 "HO 2 Elevation 51' Turbine Building Turb op. floor. O "HO 2 ,

Condenser Compt. O "HO 2

2. SGTS "A" Performance (Step 7) Inner Truck Lcck door open, outer door shut.

,, Manometer Stabilization Time 5 Min. .

DP-A-22 .85 "H20/ 3000 CFM DP-A-32 .05 "H20/ 750 CFM 8.7.3A-1 Rev.12 q

. Total 3750 CFM FI 8126 4000 CFM Elevation 91' Rx Bldg. canometer.

Actual Corrected N (1) .I6 " HO .24 " HO 2 2

.22 .26 " HO E (2)

HO 2 2

W (3) .I7 HO .25 HO2 2

S (4) .I8 HO 2

.25 HO2 Average corrected monometer DP .25 "HO2 Elevation 51' Turb Bldg manometers Turb op Floor .01 H0 3

Condenser Compt. O HO 2

Net Change from Base Turb .01 " H0 0 " H0 Cond Standby fan reverse rotation Yes No J (Step 9 )

3. SGTS "B" Performance (Step 7) Inner truck lock door open, outer door shut.

- Manometer stabilizatiou timo 5 Min.

DP-A-22 .05 "HO 2 750 CFM DP-A-32 .90 "H0 3100 CFM Total 3850 CFM FI 8126 4000 CFM Elevation 91' Rx Bldg Manometers -

Actual Corrected N (1) -.I5 HO .23 HO 2 2 E (2) _ .22 HO .26 HO 2

, 2

" " HO W (3) -.I8 HO .26 2 2

S (4) -,15 "

HO .25 "

B0 2 7 Average corrected manometer DP .25 "HO2 Elevation 51' Turb Blds manometers Turb op Floor .02 HO 2

Condenser Compt. O " HO 2

Net Change from Base Turt -.02 _"_ H2O Cond 0 "HO2 i

Standby fan reverse rotation Yes _ No / (Step 9) 8.7.3A-2 Rev. I'

• n-'4- r-N4f +

-4%-'% "c g -**e- .#%ae e e m p p g g , ,,,

. 4. SGTS "A" Parformance (Stsp 7) Inntr door shut, outer door opsn.

~

Manometar Stebilization Time 5 Min.

DP-A-22 .85 "H3 0/ 3000 CFM f

DP-A- 32 .G6 "H2 0/ 810 CFM Total 3810 CFM F1 8126 4000 CFM Elevation 91' Rx Bldg. manometer. ,

Actual Corrected N (1) .I7 "Hyo .25 "H O 2

E (2) .24 "H O .28 "H O 2 2 W (3) .I7 "H O .25 "H O 2

2 S (4) .I6 "H O .25 "H30 2

Average corrected monometer DP .2575 "H O 2

Elevation 51' Turb Bldg manometers Turb op Floor 0 "H 0 3

Condenser Compt. O "H O 2

Net Change from Base Turb 0 "E O Cond 0 "E O Standby fan reverse rotation Yes No / (Step 9)

5. SGTS "B" Performance (Step 7) Inner door shut, outer door open.

Manometer stabilization time 5 Min.

DP-A-22 +.06 "H O 825 CFM 2

DP-A-32 +.86 "E O 2900 CFM Total 3725 CFM FI 8126 4000 CFM Elevation 91' Rx Bldg Manometers Actual Corrected N (1) .18 "H O .26 "H O -

2 2 E (2) , .25 "H O 20 "H O -

2 2 W (3) .I7 "H O- .25 "H O 2 2 S (4) .l8 "H O _.75 "H O 2 2 Average corrected DP .26?5 "H 0 2

Elevation 51' Turb Bldg manometers Turb op Floo" .01 "H O 2

Condenser Compt. .01 "H O 2

Net Change from Base Turb .01 "H O 2

Cond .01 "go Standby fan reverse rotation Yes No / (Step 9) l l

• 8.7.3A-3 Rev. I 1

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