ML19318C438
| ML19318C438 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 06/25/1980 |
| From: | OMAHA PUBLIC POWER DISTRICT |
| To: | |
| Shared Package | |
| ML19318C436 | List: |
| References | |
| NUDOCS 8007010477 | |
| Download: ML19318C438 (2) | |
Text
E
.mJ ATTACHMENT Summary of Leak Rate Tests Performed in Response to Item 2.1.6.a of NUREG-0578, " Integrity of Systems Outside Containment Likely to Contain Radioactive Material"
Reference:
OPPD Response to NUREG-0578,. dated December 31, 1979.
Testing for fuel Cycle 6 has been completed in accordance with Table 1 of the referenced letter.
Detr cable leakage was reported as follows:
TABLE A' Leak System Component Rate (cc/hr)
Chemical & Volume Letdown Isolation Valve 1
Control HCV-204 (packing)
Chemical & Volume Accumulator Isolation Valve 2
Control on Charging Pump Discharge,
'CH-405 (packing)
Safety Injection Containment Spray Pump 240 SI-3A (seal)
Safety Injection Containment Spray Pump 3
SI-3C (seal)
Safety Injection Shutdown Cooling Hx Relief 3
Valve,SI-299(packing)
Waste Dispos ~
Spent Re 240 WD-148 (generant Pump seal) 489 Maintenance Orders have been issued for the reduction or elimin-ation of these leaks.
According to Section 9.10 of the FSAR:
" Total leak rates of 1200, 600 and 300 cc/hr from pump seals, flanges and valves respectively to the controlled access area of the auxiliary building are assumed; these leak rates constitute the basis for the rate of air change in the various areas and compartments in order that 10 CFR 20 requirements may be met."
Clearly, the leak rates reported in Table A are well below the assumed leak rates in every case.
In the event that significant fuel damage were to necessitate the processing and circulation of high acti.vity primary coolant, it is not felt that the leak rates of < 3 cc/hr would present a hazard to personnel either on or off site. Spent regenerant pump WD-148 processes liquid which is ' collected from the floor drains and ' stored in tanks open to the atmosphere.
Thus, no additional adverse impact is created by the slight leakage from the pump seal. Finally, the compartments in which the containment spray pumps are located are provided with charcoal filters on the ventilation system.'
8007010
[?
. 'In conclusion, it.is the opinion of the. District that the leak ~
rates determined during this surveillance program are not great enough to present a hazard in the event of an accident. Nonetheless, steps are being taken to further reduce this leakage to the lowest practical level.
1 s
L