ML20236S817
| ML20236S817 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 11/18/1987 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20236S812 | List: |
| References | |
| NUDOCS 8711300111 | |
| Download: ML20236S817 (2) | |
Text
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- CONTAINMENT SYSTEMS:
' CONTAINMENT PURGE SYSTEMS-1
'{.1I LIMITING CONDITION FOR OPERATION 3.6.1.9 teach containment purge supply and exhaust. isolation valve shall be J
y OPERABLE and:
1 m
' a.
Each containment purge supply and/or exhaust isolation valve for the
. lower compartment and the upper compartment (24-inch), instrument i
room (12-inch), and the Hydrogen Purg System (4-inch) shall.be-sealed closed, and.
b.
The Containment Air Release ndJdditio System.(4-inch) isolation 1
valve (s) may be open for up teet ruurtng a calencar yeaF' APPLICABILITY:. MOUES 1._
Pr'55"re code \\, fee ALM 4 and rupic&
- pudy ' consijudions for personnel entry
- ACTION:
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With any containment purge supply and/or-exhaust. isoiation vol w for the lower compartment and the upper compartment, or instrument room, or Hydrogen Purge Systen open or not sealed closed, close and/or seal closed that valve' or isolate the penetrations (s) within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, otherwise be in at least HOT AN08Y 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 llow 0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />.
seco ddition System isolation b.
With the Containment _ir lease and s during a calendar yea M valve (s) open for so e than ho
.the open valve (s) or
- olate t enetration(s) within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, otherwise be in at~least STANDBY 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 />.
With a containment purge supply and/or exhaust isolation valve (s) c.
having a measured leakage rate in excess of the limits of Specifi-cations 4.6.1.9.3 and/or 4.6.1.9.4, restore the inoperable valve (s).to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, otherwise be in at 6 p ur W in COLD SHUTDOWN least HOT STAND 8Y within the x
within the following 30 ho s.
or b e ceA5ons d hec h n c3
.A iYt in A '9 SURVEILLANCE REQUIREMENTS 4.6.1.9.1 Each containment purge supply and/or exhaust isolation valves for the. lower compartment and the upper containment, or instrument room, or Hydrogen Purge System shall be verified to be sealed closed at least once per 31 days.
4.6.1.9.2 The cumulative time that the Containment Air Release and Addition System has been open during a calendar year shall be determined at least once per 7 days.
CATAWBA - UNITS 1 & 2 3/4 6-16 8711300111 871118 PDR ADOCK 05000413 P
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' CONTAINMENT SYSTEMS BASES l
(-
l 3/4.6.1.8 ANNULUS VENTILATION SYSTEM The OPERABILITY of the Annulus Ventilation System ensures that during LOCA l
conditions, containment vessel leakage into the annulus will be filtered through the. HEPA filters.and carbon adsorber trains prior to discharge to the atmosphere.
Operation of the system with the heaters; operating to maintainslow humidity u' sing' automatfc control for' at least 10Tcontinuou~s hours 'in a 31-day' period is
- sufficient ~to reduce the buildup of moisture on the adsorbers and.HEPA filters.
This requirement is necessary to meet the assumptions used in the safety analyses and limit tne SITE BOUNDARY radiation doses to within the dose guide-j line values of 10 CFR Part 100 during LOCA conditions.
ANSI N510-1980 will be i
used.as a. procedural guide for surveillance. testing.
3/4.6.1.9 CONTAINMENT PURGE SYSTEMS The containment purge supply and exhaust isolation valves for the lower compartment and the upper compartment (24-inch), and instrument room (12-inch),
and the Hydro'en Purge System (4-inch) are required to be sealed closed during g
plant operation since these valves have not been demonstrated capable of c
- during a LOCA.
Maintaining these valves sealed closed during plant oper'.u ons ensures that excessive quantities of radioactive materials will not be i., cased via the Containment Purge System.
To provide assurance that these containment
(
valves cannot be inadvertently opened, the valves are sealed closed in accord-ance with Standard Review Plan 6.2.4 which includes mechanical devices to seal or lock the valve closed, or prevents power from being supplied to the valve operator.
The use of the containment purge lines is restricted to the 4-inch Con-tainment Air Release and Addition System valves since, unlike the lower compart-ment and the upper compartment, instru.ent room, and the Hydrogen Purge System valves, these 4-inch valves are capabl of closing during a LOCA.
Therefore, the SITE BOUNDARY dose guideline values of 10..CFR Part 100 would not be exceeded in the event of an. accident during cont inment purging operation.
Operation with the line open will be limited to hours during a calendar year for the 4-inch valves.
The total time the containment purge (vent) system isolation valves may be open during MODES 1, 2, 3, and 4 in a calendar year is a function of anticipated need and operating experience.
Only safety-related reasons; e.g., containment pressure control or the reduction of airborne radioactivity to facilitate personnel access for surveillance and maintenance activities, may l
be 'used to eppert the eddition:1 tiec r:mta 'psth he opq of 4 hse.15.bd/on l
9.Nc.S.
Leakage integrity tests with a maximum allowable leakage rate for contain-ment purge supply and exhaust valves will provide early indication of resilient material seal degradation and will allow opportunity for repair before gross leakage failures could develop.
The 0.60 L, leakage limit of Specification 3.6.1.2b. shall not be exceeded when the leakage rates determined by the leakage integrity tests of these valves are added to the previously determined total for all valves and penetrations subject to Type 8 and C tests.
CATAW8A - UNITS 1 & 2 8 3/4 6-3
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