ML20210Q410

From kanterella
Jump to navigation Jump to search
Proposed Tech Specs Section 3/4.6.4, Vacuum Relief, Removing Specific Operability Requirements Related to Position Indication for Suppression chamber-drywell Vacuum Breakers & Revising Action Statements & Srs,Per NUREG-1433
ML20210Q410
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 08/06/1999
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20210Q401 List:
References
RTR-NUREG-1433 NUDOCS 9908160023
Download: ML20210Q410 (10)
v • d • e


Text

-

,j . I,2,

  • ATTACHMENT B Proposed ChA1ges to Technical Specifications for

. . LaSalle County Station, Units 1 and 2 l

MARKED-UP TS PAGES FOR PROPOSED CHANGES REVISED PAGES 9908160023 990006 PDR ADOCK 05000373 P PDR l

l L  :

~

.y  :.

?;1 -

, l CONTAINMENT SYSTEMS l

~

3/4.6.4 VACUUN RELIEF l

. \

~

LIMITING CONDITION FOR OPERATION 3

c' >

1 suppression chamber - drywell vacuum breakers shall be '5PERABL(

I APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3. l l

ACTION: h gg g g , a y ,g g j gg[

a. With one suppression chamber - drywell vacuum breaker inoperable '

and/or open, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> close the manual isolation valves on  !

both sides of the inoperable and/or open vacuum breaker. Restore  !

the inoperable and/or een vicuum breaker to OPERABLE and closed status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> Ge be in at least NOT SHUTDOWN within the k next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

b. With one position indicator of any OPERABLE suppression chamber -

drywell vacuum breaker inoperable, restore the inoperable position indicator to OPERABLE status within 14 days or visually verify the i vacuum breaker to be closed at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Otherwise,

( declare the vacuum breaker inoperable.  ;

s j l

SURVEILLANCE REQUIREMENTS 4.6.4.1 Each suppression chamber - drywell vacuum breaker shall be: i

a. Verified closed at least once per days.
b. Demonstrated OPERABLE:
1. At least once per 31 days and within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> after any discharge of steam to the suppression chamber from the safety-relief valves, by cycling each vacuum breaker through at least one complete cycle of full travel.
2. At least once per 31 days by verifying both position indicators OPERARLE by performance of a CHANNEL FUNCTIONAL TEST.

2g At least once per 18 months [$

kerifyMhe force required to open the vacuum breaker, from '

the closed position, to be less than or equal to 0.5 psid, and b Verifying both position indicators OPERABLE by performance of a' k) CHANNEL CALIBRATION.

\ Abb mtr B ATrscHe5 '

LA SALLE - UNIT 1 3/4 6-35 Amendment No. 38

1

); .

ATTACHMENT B ,

Proposed Ching:s to Technical Specifications for  !

LaSalle County Station, Units 1 and 2

)I Insert A

a. With one suppression chambar- drywell vacuum breaker inoperable for opening, restore the inoperable vacuum breaker 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 be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

i

b. With one suppression chamber- drywell vacuum breaker inoperable and open, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> close the manual isolation valves on both sides of the inoperable and open vacuum breaker. Restore the inoperable vacuum breaker 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 be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

insert B

)

Surveillance Requirement 4.6.4.1.a is not required to be met for suppression chamber

- drywell vacuum breakers that are open during Surveillances or for suppression 1 chamber - drywell vacuum breakers that are functioning for pressure relief during l normal and off-normal plant operations. I l

i

,, i

~

d' CONTAINMENT SYSTEMS .

l SURYETLLANCE REOUIREMENTS (Continued)

- -b !

p 4.6.4.2 The manual isolation valves on both sides of an inoperable and/or open suppression chamber-drywell vacuum breaker shall be verified to be closed l at least once per 7 days.

1 i

i i

i i

LA SALLE - UNIT 1 3/4 6-36 Amendment No. 102

. p,- .

1 CONTAINMENT ' SYSTEMS l 3/4.6.4 VACUUM RELIEF l

LIMITING CONDITION FOR OPERATION i

3.6.4 All suppression chamber - drywell vacuum breakers shall be OPERABL and A l APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3.

ACTION:

a. With one suppression chamber - drywell vacuum breaker inoperable ) ,

and/or open, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> close the manual isolation valves on both sides of the inoperable and/or open vacuum breaker. Restore i the inoperable and/or open vacuum breaker to OPERABLE and closed status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least NOT SHUTDOWN within the i next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, i

b. With one position indicator of any OPERABLE suppression chamber - , 4 drywell vacuum breaker inoperable, restore the inoperable position indicator to OPERABLE status within 14 days or visually verify the vacuum breaker to be closed at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Othe mise, declare the vacuum breaker inoperable. J l SURVEILLANCE REQUIREMENTS 4.6.4.1 Each suppression chamber - drywell vacuum breaker shall be:
a. Verified closed at least once perhays.*
b. Demonstrated OPERABLE:
1. At least once per 31 days and within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> after any discharge of steam to the suppression chamber from the safety-relief valves, by cycling each vacuum breaker through at least one complete cycle of full travel.

I .'

2 At least once per 31 days by verifying both position indicators OPERABLE by performance of a CHANNEL FUNCTIONAL TEST.

(

8g At least once per 18 months g Verifyifig-the force required to open the vacuum breaker, from .

the closed position, to be less than or equal to 0.5 psid, and b) Verifying both position indicators OPERABLE by performance of a " A CHANNEL CALIBRATION.

@ JA) SECT-T ATIATMP)

LA SALLE - UNIT 2 3/4 6-38

p; '%

ATTACHMENT B  !

Proposed Ching:s to Tcchnical Sp:cifications for LaSalle County Station, Units 1 and 2 Insert A

a. With one suppression chamber- drywell vacuum breaker inoperatie for opening, restore the inoperable vacuum breaker 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 be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
b. With one suppression chamber- drywell vacuum breaker inoperable and open, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> close the manual isolation valves on both sides of the inoperable and open vacuum breaker. Restore the inoperable vacuum breaker to OPERA 9LE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Insert B Surveillance Requirement 4.6.4.1.a is not required to be met for suppression chamber

- drywell vacuum breakers that are open during Surveillances or for suppression chamber - drywell vacuum breakers that are functioning for pressure relief during normal and off-normal plant operations.

I l

l l

1 l

i l

CONTAINMENT SYSTEMS SURVEILLANCE REOUTREMENTS (Continued) e l 4.6.4.2 The manual isolation valves on both sides of an inoperable and/or open supp'r ession chamber-drywell vacuum breaker shall be verified to be closed at least once per 7 days. i d

l l

1 l

l l

I l

1 1

i 1

LA SALLE - UNIT 2 3/4 6-39 Amendment No. 87 e

p; I{' i

~

ATTACHMENT C Proposed Changes to Technical Specifications for LaSalle County Statiori, Units 1 and 2 1of2 4 l

lNFORMATION SUPPORTING A FINDING OF NO SIGNIFICANT HAZARDS CONSIDERATION Comed has evaluated the proposed changes and determined that it does not ineolve a significant hazards consideration. According to 10 CFR 50.92(c), a proposed amendment to an operating license involves no significant hazards consideration if operation of the facility in accordance with the proposed amendment would not:

Involve a significant increase in the probability of occurrence or consequences of an accident previously evaluated; Create the possibility of a new or different kind of accident from any

, previously analyzed; or involve a significant reduction in a margin of safety.

Comed proposes to revise the requirements of TS 3/4.6.4," Vacuum Relief," to be ,

consistent with the requirements provided in NUREG-1433, Revision 1, " Standard '

Technical Specifications, General Electric Plants, BWR/4."

The determination that the criteria set forth in 10 CFR 50.92 (c) is met for this amendment request is indicated below.

Do the proposed changes ir;volve a significant increase in the probability or consequences of an accideat previously evaluated?

The proposed changes do not change the hardware configuration of the suppression chamber-drywell vacuum breakers, and the vacuum breakers are not considered an initiator in any accident scenario. The removal of specific indication requirements and the extension of the surveillance interval does not impact the ability of the vacuum breakers to perform their safety function. The vacuum breakers continue to meet their intended design function. The proposed changes do not impact the assumed source term for any analyzed accident. Therefore, no increases in the probability of an accident or consequences will result due to this proposed change.

P ,,,

g q l

l .

l ATTACHMENT C l Proposed Changes to Technical Specifications for LaSalle County Station, Units 1 and 2 2 of 2 Do the proposed changes create the possibility of a new or different kind of accident from any accident previously evaluated?

i i

The proposed changes do not involve any physical alterations to the suppression l l chamber-drywell vacuum breakers, or cause any changes in the method by which the vacuum breakers or the containment vacuum relief system performs their associated design basis functions. Therefore, the proposed changes do not create the possibility of a new or different kind of accident from any accident previously evaluated. I 1

1 l

Do the proposed changes involve a significant reduction in a margin of safety?

The proposed changes do not impact the design function assumed for the containment vacuum relief system. The proposed changes do not require the vacuum breakers to operate in a condition not previously assumed in the facility accident analysis. The containment vacuum relief system will continue to operate I and provide the protection assumed in the accident analysis. In order to limit bypass, the vacuum breakers are in a normally closed position. These vacuum breakers cannot be perma:iently placed in the open position. The proposed decrease in the surveillance frequency verifying the closed vacuum breakers will not increase the risk of the vacuum breakers being in the open position, since they will only open in response to a pressure differential or manual cycling. Therefore, the assurance of the operability of the containment vacuum breakers would be the same as provided under current Technical Specifications. The containment response analysis is unchanged, in that the vacuum breakers protect the containment structure, the peak containment pressure remains as calculated, and the vacuum breakers continue to maintain bypass leakage rates as assumed. Therefore this oroposed change does not cause a reduction in the margin of safety.

Therefore, based upon the above evaluation, Comed has concluded that these changes do not constitute a significant hazards consideration.

s.

g% l i

ATTACHMENT D  !

Proposed Change to Technical Specifications for '

. . LaSalle County Station, Units 1 and 2 I of I INFORMATION SUPPORTING AN ENVIRONMENTAL ASSESSMENT l Comed has evaluated the proposed changes against the criteria for identification of licensing and regulatory actions requiring environmental assessment in accordance with 10 CFR 51.21. Comed has determined that the proposed changes meet the criteria for a  ;

categorical exclusion set forth in 10 CFR 51.22(c)(9) and as such, has determined that j no irreversible consequences exist in accordance with 10 CFR 50.92(b). This  ;

determination is based on the fact that this change is being proposed as an arnendment l to a license issued pursuant to 10 CFR 50 that changes a requirement with respect to installation or use of a facility component located within the restricted area, as defined i

in 10 CFR 20, or that changes an inspection or a surveillance requirement, and the proposed changes meet the following specific criteria.

(i) The proposed changes involve no significant hazards consideration. l The proposed changes do not involve a significant hazards consideration.

-(ii) There is no significant change in the types or significant increase in the amounts of any effluent that may be released offsite.

The proposed changes are administrative in nature. There will be no change in the types or significant increase in the amounts of any effluents released offsite.

-(iii) There is no significant increase in individual or cumulative occupational radiation exposure.

The proposed changes will not result in changes in the operation or configuration of the facility. There will be no change in the level of centrols or methodology usect for processing of radioactive effluents or handling of solid radioactive waste, nor will the proposal result in any change in the normal radiation levels within the plant. Therefore, there will be no increase in individual or cumulative occupational radiation exposure resulting from the proposed changes.

I

Retrieved from "https://kanterella.com/w/index.php?title=ML20210Q410&oldid=3308699"