ML20069L504
| ML20069L504 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 04/25/1983 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20069L485 | List: |
| References | |
| TAC-51419, NUDOCS 8304280224 | |
| Download: ML20069L504 (4) | |
Text
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Docket No. 50-336 ATTACHMENT 1 MILLSTONE NUCLEAR POWER STATION, UNIT NO. 2 PROPOSED REVISIONS TO TECHNICAL SPECIFICATIONS April,1983 8304280224 830425 PDR ADOCK 05000336 P
PDR-
REFUELINS 0 ERATIONS CONTAIN*ENT PENETRATIONS LIMITING CONDITION FOR OPERATION 3.9.4 The containment penetrations shall be in the following status:
The ecuipment door closed and held in place by a minimum of
-a..
fourbolts?
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b.
'A mininx of one door in each airlock is closed, and l
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c.
Each penetration providing direct access from the containment atmosphere to the outside atmosphere shall be either:
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Closed by an isolation valve, blind flange, nanual valve, or special device, or
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Be ca:able of being cigsed by an OPERABLE automatic containment purge val've.
ApFLICABILITY:
DURING CORE ALTERATIONS OR MOVEMENT OF IRRADIATED FUEL Ginih ini CONTAINMENT.
ACTION:
k'ith the re:uirements of the above specification not satisfied, in edi-ately suseer.d all c:erations involving CORE ALTERATIONS or movement of irradiated fuel in tne containment.
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SU:!.*EILLANCE REOUIREMENTS 4.9.4 Each of the above required containment penetrations shall be determined to be either in its isolated condition or capable of being
- lesed by an OpIRAELE automatic containment purge valve within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> j
prior to the start of and at least once per 31 days during CORE ALTER *TIONS or msvement of irradiated fuel in the containment by:
a.
Verifying the penetrations are in-their isolated condition, or L
b.
Testinc.the containment purge valves per the applicable portions of Specificatien ~4.6.3.1.2.
7 For the Cycle 6 refueling only, during fuel movement or core alterations, a j
temporary equipment door may be substituted for the equipment hatch
~ door to facilitate steam generator maintenance activities. The temporary equipment door is described in the W. G. Counsil letter to R. A. Clark, dated April 25,1983.
M'LLETONE - UNIT 2 3/4 9 4
Docket No. 50-336
. ATTACHMENT 2 MILLSTONE NUCLEAR POWER STATION, UNIT NO. 2 INFORMATION TO SUPPORT PROPOSED TECHNICAL SPECIFICATION April,1983
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.- The Millstone Unit No. 2 containment building includes an equipment hatch,
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nineteen (19) feet in diameter, provided to permit transfer of large components into and out of the containment. It is fitted with a double gasketed flange around the dished door to minimize leakage in the unlikely event of a loss-of-coolant-accident (LOCA). - Additional details and drawings of the_ equipment hatch door are1 included in Section 5.2.7 of the Final Safety Analysis-Report (FSAR). -
Technical Specification 3/4.9.4 specifies the required status of certain contain-ment penetrations'during core alterations or movement of irradiated fuel within
' the containment.
These requirements ensure that a release of radioactive material within the containment will be restricted from leakage to the environ -
ment. ;The radioactive material released from a postulated fuel element rupture would be. maintained within the building due to the lack of containment pressurization potential while in the refueling mode coupled with the penetration
' integrity requirements.
The temporary equipment hatch door proposed to be utilized during the Cycle 6 refueling outage will consist of a circular % inch steel plate with stiffeners. The door will be mounted to the 3/4 inch thick, 8 inch wide embedded plate which circles'the exterior end of the equipment hatch containment penetration. It will be secured.in place by thirteen (13) studs which will be welded to the embedded plate. Thel attached drawing details 'the proposed equipment hatch door, this drawing is preliminary and four copies are included for the Staff's information.
An O-ring gasket is located between the temporary door and the embedded plate -
to-provide an " air tight" seal between the containment and-the enclosure -
building.
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Ten (10) six inch diameter penetrations through the door are provided for various L
hoses and electrical cables needed to' support the steam generator channel head chemical decontamination project. This work is scheduled to be performed in parallel with fuel movement.
The temporary door is designed to maintain 7-
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L primary containment penetration integrity required by. Technical Specification i
3.9.4 during core alterations or movement of irradiated fuel within the contain-l ment.
The ten (10) penetrations will be isolated by blind flanges when not in use.
Penetrations in which cables or hoses pass through will be sealed with silicone RTV fire ' resistant foam to provide the required sealing.
l The features incorporated into the design of this temporary equipment hatch L
door ensure that containment integrity will be maintained while core alterations or fuel movements are conducted within the containment considering the negligible pressure gradient which will exist across the equipment hatch penetra-
- tion. -
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