ML20039F888
| ML20039F888 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 12/18/1981 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20039F886 | List: |
| References | |
| NUDOCS 8201140016 | |
| Download: ML20039F888 (2) | |
Text
._
Enclosurei4
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SAFETY EVALUATION REPORT MECHANICALdP I
F E/ VENT VALVE.S HADDAM NECK PLANT Brookhaven National Labs (BNL) in conjunction with the NRC staff has reviewed the Connecticut Yankee Atomic Power Company (CYAPC) letters of J.anuary 3,1979 and December 10, 1979 which were in response to NRC reauests concerning containment purge / vent operability.
CYAPC has explained that the 42.0 inch purge valves in the Haddam Neck Plant are a manually operated type, and that purging through them is prohibited by Technical Specifications unless the plant is in cold shutdown or refueling.
The staff interprets the licensee's response concerning the 42.0 valves as satis-fying the NRC's operability requirement for interim and long term use in that the operability of these valves in the closed position during all modes except cold shutdown or refueling are no longer in question. Based on this, the staff does not plan any further action in the area of operability demonstration evaluation for these valves and finds the -containment isolation capability of these valves while in the closed position, acceptable.
The licensees letter of December 10, 1979 also explained that venting during plant operation can be accomplished using the air particulate monitoring lines.
The information provided durino the July 15, 1979 meeting with the licensee showed that these air monitoring lines were only 1.0 inches in diameter and therefore do not fall.within the scope of our review as established 'by the NRC Interim Position for containment purge and vent valve operation.
8201140016 011218 PDR ADOCK 05000213 p
PDR o
4 ENCLOSURE 5 +.
7 CONTAINMENT SYSTEMS LIMITING CONDITION FOR OPERATION l
l Ttle containment purge supply and exhaust iso'lation valves may 3.6.1.7 be open for safety-related reasons [or shall,be locked closed).
The containment vent line isolation valves may be open for safety-related reasons (or shall be locked closed).
i
' APPLICABILITY:
MODES 1, 2, 3, and 4 ACTION:
(For plants with valves closed by technical specification)
With one containment purge supply and/or one exhaust isolation valve open, close the open valve (s) within one hour or be in at least HOT STAMDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
(For plants with valves that.may be opened by technical specifications) 1.
With one containment purge supply and/or o.ne exhaust isolation or vent valve inoperable, close the associated OPERABLE valve and either restore the inoperable valve to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or lock the OPERABLE valve closed.
b Operation may then continue until performance of the next required 2.
valve test provided that the OPERABLE valve is verified to be locked closed at least once per 31 davr.
Othersise, be in at least HOT STANDBY within the next six hours and 3.
in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
The provisions of Specification 3.0.4 are not applicable.
4.
SURVEILLANCE REQUIREMENTS
-inch containment purge supply and exhaust isolation valves The 4.6.1.7.1
-incli~ vent line isolation valves shall be determined locked closed and the --
at least once per 31 days.
The valve seals of the purge supply and exhaust isolation valves 4.6.1.7.2 and the vent line isolation valves shall be replaced at least one per _ years.
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