ML18032A719
| ML18032A719 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/25/1988 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML18032A718 | List: |
| References | |
| NUDOCS 8802020207 | |
| Download: ML18032A719 (2) | |
Text
ENCLOSURE SECONDARY CONTAINMENT LEAK RATE TEST PERFORMED OCTOBER 26, 1987 BROMNS FERRY NUCLEAR PLANT (BFN) 1.0 Browns Ferry Nuclear Plant Unit 2 Secondary Containment Leak Rate Test Report, per Technical Specification 6.7.3.C.l.a.
2.0
~pre ose This report describes the results and analysis of the test data taken during leak rate testing, of the Browns Ferry Nucleai Plant Unit 2 secondary containment, pursuant to Technical Specification 4.7.C.1.a.
3.0 Procedure Surveillance Instruction (SI) 4.7.C outlines the procedures followed during secondary containment leak rate testing.
4.0 Data The SI was performed concurrently on all zones.
SI 4;7.C. data sheets list the following test, data:
1.
Standby gas treatment system flowrate:
9,617 CFM 2.
Reactor building differential pressures Unit 1 Reactor Zone Unit 2 Reactor Zone Unit 3 Reactor Zone
.32
.30
.26 in. H20 in. H20 in. H20 Unit 1 Refuel Zone Unit 2 Refuel Zone Unit 3 Refuel Zone
.30 in. H20
.31 in. H20
.28 in. H20 3.
Mind Speed 4.
Mind Direction 3.7 MPH 175 5.0
~ Anal sis and Inter retation SI 4.7.C demonstrates secondary containment capability to maintain 1/4-inch water vacuum under calm wind (< 5 MPH) conditions with a system leakage iate of not more than 12,000 CFM.
The secondary containment (all three reactor zones and the common refuel zone) was leak rate tested on October 26, 1987.
The test showed an inleakage of 9,617 CFM while maintaining a vacuum of.26 inches water, which meets the acceptance criteria.
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II