ML20236P366

Proposed Tech Spec Tables 3.3-6 & 4.3-3 to Allow Control Room Ventilation Sys to Remain in Operation Provided That Two Radiation Monitors Operable on Ventilation Train That Is Operating

ML20236P366
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	11/06/1987
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20236P365	List: ML20236P362 ML20236P366
References
3801K, NUDOCS 8711170270
Download: ML20236P366 (9)

Text

g, _

^ ^^'

~,.j?

t

<- Q ) . .g ,

4 ,, ,  ;

ATTACHMENT A.

PROPOSED CHANGES-TO APPENDIX A, TECHNICAL SPECIFICATIONS OF FACILITY ~-

OPERATING LICENSES NPF-37, NPF-66 and NPF-72 Hyron Station 'Braidwood Station

. Revised Pages: '3/4 3-40 Revised Pages: 3/4 3-40 3/4 3-41 3/4 3-41'.

L 3/4 3 :3/4 3-42 l

i l

'l

'k 1 l

1 871117ag79 B71106 PDR g

P ADOCK 05000454 PDR

3801K 1

-'kt

. - - = . . . . _ . _ _ _ . . _ . . _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ , , _ _ _ . _ _ , _ _

Ill1lli\];

.F N

O I

T C

A 9

2 66 22 88 22 88 22 97 222 7

P -

I RT TN h t thh //

_ /I / /R RR MO RP R

m . . . .

mmm

. S AT LE 5 *

• A. A. A. A. 2 22 N AS < *

• NN NN < 5

_ O

. I T

A E 44 44 R L .

E B , , , ,

P A 33 33 O C IS , , , ,

T LE 22 22 N PD l l l l I A PO l l , , , ,

l l l

L P

AM

• AA 11 11 AAA R

O SE -

F MLL 2 UEB 5 e

N MNA rk O INR ea I NAE pt 6 T IHP 3

- A T

MCO 2 22 11 11 2 i n2 N 2 3 E M M E U R ,

L R A B T L A S A T N S/

I LP EI G NR N NT . . . .

I A R HO A. A. A. A.

O CT 1 11 NN NN 1 } I T

I N )

O 0 M 4 N 3 O /-

B ) )8 I

T -

3 2B 31 3

A n I ) - - os 03 /

R / B D 6 y y i u A

R n

- 5

/

t )) t t o P 853 od5 i

- v 22 i ae E-1 11 - )) v )) l s R 3 o i n5 ta0 ni ot

//

11 yn88 t o11 inAA to11 oa sG O R0 r(

a R i c 11 ii11 ci11 I - dP P lhA t a 00 vt00 at00 eh n -

og- ao RR i cRR ocRR mk g a -

siE IHR l i AA t ePP i ePP oai E E

- O od sa EE ct - -

aeEE dt - -

aeEE oti 0 R R l gy( IR RR oDRR RDRR R In2 y3 O O C nt I2 i I2 12 l t/(

iiy tt (( d e(( ee(( ori8 T dvt nn ag t g ri 3v1 A B I lii ee 12 R a12 aa12 tai

. N itl mm k l k n t0 n ;n U uca nn tt satt uatt oecRi a Bac i i i i ueii ceii CdaP%iT L oi aa nn oL nn i L nn i o-A l i t tthUU e UU t UU nsiE N edi nng sS rS itdR O uar ooi)) aC)) aC)) aua I

T FRC CCliab GR ab PR ab MORP )c Q C

N U . . . .

F 1 2 3 4 5 mf,e ' c5d p. y R* Yg

' lll l! l! ,Ill. lll l l l'jll !Illll ll !l

3; ,

g y  :( l l

^ '

TABLE NOTATIONS I l

~*With new fuel or irradiated fuel.in the fuel storags areas or' fuel-building.

~

n '

I

• • Trip Setpo' int ^islto be. established 'such that the actual.' submersion dose rate ')

.would not' exceed.10 mR/hr;in the' containment building.x For containment purge: 1 1

or vent the Setpoint value may.be' increased up'to~twice:the maximum concentra : 1

-tion activity in the containment' determined by the sample analysis-performed 4

prior to.each release in accordance with Table 4.11-2 provided the'.valueldoes 1 not exceed 101 of the' equivalent limits of~ Specification 3.11.2.1.a in accord-

ance:with the_ methodology and parameters in the ODCM.

l

' ACTION STATEMENTS

~

ACTION'26 -

With less than the Minimum Channels OPERABLE requirement, operation' L

1may continue provided the. containment purge, valves are maintained closed.

' ACTION 27-  :

Channels OPERABLE requirement,.within 1 hourfisolate the Control

- With the number of'0PERABLE channels one'1e j Room Ventilation System and initiate operation of the Control Room L i

Make-up System.

{,

4 ACTION 28 - Must satisfy the ACTION requirement for Specification 3.4.6.1.-

i

' ACTION 29 -

With the number of OPERABLE channels one less than the Minimum %

Channels OPERABLE requirement. ACTION a. of Specification 3.9.12!'

must be satisfied. With both channels inoperable, provide'an' appropriate portable continuous monitor with the same Alarm Set-point'in the fuel pool area with one Fuel Handling Building ,

Exhaust filter plenum in operation. Otherwise satisfy ACTION b.  !

of Specification 3.9.12.g . )-

Qwitch +o +he. redundani- fro;n of Confrel Room t (VenHlahon, the Minimum Channels Pc vided OPERABLEthereguiremtat redundani-or train m

1. Satisfaction of Specification 3.9.12 ACTIONS are not required prior to July 1, 1985 when there is no irradiated fuel in the storage pool.

. i i

BYRON - UNITS 1 & 2 3/4 3-41

_ - . - _ - . - _ a

D E

R I

U Q

E R

HS CI I

HE WC N 44 44 RA OL , , , ,

FL 33 33 I

SE , , , ,

EV 22 22 T DR l l N OU l l , , , ,

. l A MS

• AA l

L P

11 11 A M S i RT L d ON A l FE N i M O NE LLI b OR AET I I TNA l TU I NRT AQ GAES f TE I HPE NR DCOT H HM 3

E ME HM HH MM 3 UC

. RN N 4 TA O SL I E NL T L I I LA '

B E ER l A GV Nl T NR NI I U AL RS HA O CC R RR TS RR RR R E t I N NO l OI L MT E A NK f NR NC OE AE -

I P HH TO A

I CC S SS SS SS '05 2

S h

t D 3 A

R

/

0 1

)6 )89 i

l n

3 0 25 e

. )

6 y - osR 5/ f 5 t ))

y i uP /6 n

- t t o- g3 d

/ i 22 i aeE t 3 e od5 - v 11 )) v ))

i n5 ni //

yn88 i nAA l sR oa0 3o t a

t a0 a R ot ic 11 11 t o11 ii11 t o11 ci11 sGf* - )Ro R i eh0T-P da I -

l hA t a 00 vt00 atO0 og- ao RR ocRR i cRR mk g4 - r siE l i AA t ePP i ePP oai3 r I HR od - - ct - - dt - - otH/ EE i

- O sa EE aeEE aeEE R n 0R a gy( IR RR oDRR RDRR I y3O c r nt I2 i I2 I2 o o r it3G (. (.

l T ii y tt (( d e(( ee((

I d vt nn ag t g N

U l ii itl ee mm 12 R a12 aa12 trivRA6l AiP e uca nn k l k n t - u L B ac ii tt satt ueii uatt oecEinn f A oi aa ii nn oL nn ceii iL nn Cd aRuai N l it tthUU e UU t UU nsi icO-i

- ~r w O

I edi uar nng ooi))

sS rS itdd TT e n aC)) aC)) auai )

T C

FRC CCH ab GR ab PR ab MOR er )o b h t N i

_ U .

F 1 2 3

4 5

W Eg2  :

e E q U' 90* or ,g [to

iIl( ,I1 i!!

. T N

O I

T C

A 9

2 66 22 88 22 88 22 7

?

'I I

9 2

E P h h m

I / )

a, RT 8> 8 TN h h

/ >

/I MO

/

R P r m 4 RP m . . . .

m% z AT S LE 5 *

• A. A.  ?

N A. A.

O I

AS < *

• NN NH '_ 6i T

A E 44 R L 44 E B , , , ,

P A O C 33 33 IS , , , ,

T LE 22 N PD ll 22 l I

l l

A PO ll , , , ,

1 L AM

• 1 P AA 11 11 ,

^. AA R .

O SE F MLL UEB

.N O

MNA r h INR I NAE e 6

3 T

A T

N IHP MCO .2 22 11 11 2 p

[2

^

3 E M M E U R L R A B T L A S A T N S/

I LP EI G NR N NT . .

I A . .

R HO

.O CT A. A. A. A. g I T 1 11 NN NN 2 I

N O

M )) )

S

" 8 8 N 2 2 9 O

I

/ 3 3 B //

T A

I D

A

)

6 y y

n os i u 3

3 0

R 3 3 P

B 8 1 3 _

- 5 t ))

R n / i 22 t~ t o - 6 O od5 - v 11 - ))

i ~

v ))

ae E 8 R in5 ni // l s R ta0 ot 11 ynB8 to11 i nAA t o11 oa sG O F P a R ic 11 ii11 ci11 I - d - -

lhA t a 00 og- ao RR vt00 icRR at00 ocRR mk eh=g E6 e

siE IHR li od AA tePP i ePP oai R

- - ct - -

g y(O

- sa EE aeEE dt - -

aeEE otHB o Rn2 ( o nt IR RR I2 oDRR RDRR I y3 (

T ii y dvt tt nn

(( dag e ((2 i 1 ee((

t g I2 l oriB t/ A 6 ,

I lii ee 12 riv1 N mm Ra12 aa12 tai 3 n itl k U uca nn lk n t0 L

Bac oi i i aa tt ii nn satt ueii uatt ceii oecR Cdio-aP r e 'n..

A oLnn iL nn N

O li t edi uar tthUU nng e sS UU t rS UU nsiE T Tr i tdR I

T C

FRC ooi))

CCliab aC))

Grab aC))

PRab auaO MOR( )a )b N

U . . . .

F 1 2 3 4 5

=RE8o ' 5 m H G* w1 wAo j,il llI

TABLE NOTATTONS

• With new fuel or irradiated fuel in the fuel storage areas or fuel building. .

• • Trip Setpoint is to be established such that the actual submersion dose rate l'

.would not exceed 10 mR/hr in the containment building. For containment purge or vent the Setpoint value may be increased up to twice the maximum concentra-tion activity in the containment determined by the sample analysis performed j prior to each release in accordanco with Table 4.11-2 provided the value does i not exceed 10% of the equivalent limits of Specification 3.11.2.1.a in accord- i ance with the methodology and parameters in the ODCM.

ACTION STATEMENTS l ACTION 26 -

With less than the Minimum Channels OPERABLE requirement, operation i may continue provided the containment purge ralves are maintained I closed.

ACTION 27 -

With the number of OPERABLE channels one less than the Minimum Channels OPERABLE requirement, within 1 hourKisolate the Control Room Ventilation System and initiate operation of the Control Room Make-up System.

i ACTION 28 -

Must satisfy the ACTION requirement for Specification 3.4.6.1.

ACTION 29 - With the number of OPERABLE channels one less than the Minimum Channels OPERABLE requirement, ACTION a. of Specification 3.9.12#

must be satisfied. With both channels inoperable, provide an appropriate portable continuous monitor with the same Alarm Set-point in the fuel pool area with one Fuel Handling Building Exhaust filter plenum in operation. Otherwise satisfy ACTION b.

of Specification 3.9.12.#

S WE+ch -l-b 4-k e re) un b ad 4-re In 6 -( C.on-[cc } Aoem tje d ;lailen, p rovid ed f h e_ ec.dundavd +roin M e t f,!

+ H t. Yn i s i mn m C h a nn e Ls OPSRhBLE n uir e m M f w a

l l

1

1. Satisfaction of Specification 3.9.12 ACTIONS a. and b. not required prior to initial operation at > 5% Rated Thermal Power on Cycle 1.  !

l l

l l

BRAIDWOOD - UNITS 1 & 2 3/4 3-41

(

, I 1 _ _ _ _ _ _ - _ _ _ _ J

D E

R I

U HS Q

E R

- CI I

HE WC N 44 44

- RA

- OL , , , ,

FL 33 33 I

_ SE , , , ,

EV 22 22 T DR l l l l

N OU l l , , , ,

l l

A L

MS

• AA 11 11 A A g.

P n i

S d RT L l ON A i

. FE N u M O b NE LLI OR AET l II TNA e TU INRT u AQ GAES f TE IHPE 3

3 NR E

ME UC DCOT M MM MM MM H mro

. RN N s 4 TA O a SL I e E NL T r L II LA a B E ER A GV NB e NR g T NI a I U AL r RS HA O CC R RR RR RR o

TS R 8t s I N NO l OI L e MT E u A NK f NR NC OE AE e IP HH TO A

CC S SS SS SS BS . sh t I 2 D

A /

3 B

)s )B n i R

1 3

uwle

) - -

n osR 0 l/u e8 f 6 y y i u t 3

- 5 t )) t t o "- s3 d n / 22 od5 - v i

11 - ))

i v ))

aeE l sR oo et i n5 t a0 ni ot

//

11 yn88 t o11 i nAA t o11 oa0 s es a a R i c 11 ii11 ci11 sG(

I - : ) eP i d

l hA t a 00 vt00 at00 eh9 - - a og- ao RR icRR ocRR mk g1 r siE IHR l i od AA t ePP ct - -

i ePP dt - -

oai3eE r sa EE otH/Rei gy(- O IR RR aeEE oDRR aeEE RDRR R I nBoe y3 r nt I2 i 12 12 l t3 o T i i y tt (( ee((

I N

dvt nn ee 12 d e((

ag t g o rivR 0 M (8 r i l l ii Ra12 aa12 tai" e U i tl mm k l k n t - nat uf uca nn tt satt uatt L

A B ac oi ii aa ii nn ueii ceii oecEaa Cd aR r N

O I

l it edi uar tthUU nng oL nn e

sS UU iL nn t

rS UU nsi itdd ioO TrTe

)

w n

T C

FRC ooi))

CCHab aC))

GR ab aC))

PR ab aua=)* b h MOR -

t N i U

F 1 2

3 4

5 W

Eig8

" ' EZ] " w) w1N

@we ~ 9- T l

4 fK-l <ef .e:

j. 4 L" , ' a s

W '

,s

, LTTACHMENT B-(~

, - DESCRIPTION ' AND SUf9fARY OF PROPOSED CHANGES -

• . _LThe proposed, changes involve' Technical Specification Tables 3.3-6,

'and 4.3-3'for the Byron and.Braidwood Stations. The Control Room

. Ventilation '(VC) System consists of two trains with.two radiation' monitors cinstalled per. train. Under'the seven' day action. statement of the VC system

. Technical' Specification;one VC system train can be in' operation.at a. time.

As presently worded, the-Radiation monitor Technical Specification'at each.

Station requires the ' Control Room Ventilation System to be. isolated and the Control Room,Make-up System to'be started if any of the four-radiation monitors becomes1 inoperable, even;if'the inoperable monitor is on the ,;

ventilation. train.that11s not in operation. The proposed Technical y

. Specification change will' allow the Control Room Ventilation System to l remain in" operation provided there are two radiation' monitors operable on

!the ventilation train in operation.

The current Technica1'Specificationfwording is-overly restrictive  ;

because the failure of one radiation monitor does not necessarily indicate a '

< radiological event, such that.the Control Room-Ventilation System should be JO isolated. . Upon review, Commonwealth Edison believes.the Technical Specification.should. allow the second ventilation train to be' started if a circumstance arises whereby the first VC system train is' declared inoperable, due to'one of its' radiation monitors becoming inoperable. If one of-the two radiation monitors in the second. operating Control Room

-Ventilation System cannot be maintained operable, then the-Control Room Make-up system will be put into operation as;is currently required.- ,

1 By' making theseLchanges and by not having to use the Control Room >

.Make-up System as often as is currently required, unnecessary expenditure of l

.the Make-up System charcoal adsorber life will be reduced.

i I

3801K-

ATTACHMENT C  !

• l EVALUATION OF SIGNIFICANT HAZARDS CONSIDERATIONS i

Commonwealth Edison has evaluated this proposed amendment and determined that it involves no si'nificant g hazards considerations. l According to 10 CFR 50.92(c), a proposed amendment to an operating license involves no significant hazards considerations if operation of the facility in accordance with the proposed amendment would not:

1

1) Involve a significant increase in the probability or consequences l of an accident previously evaluated; or

2) Create the possibility of a new or different kind of accident from any accident previously evaluated; or i

3) Involve a significant reduction in a margin of safety. l The VC System is made up of two redundant trains that include four (4) radiation monitors, two installed in each train. The proposed amendment involves the operability of these radiation monitors and the related j operability of the VC system trains. Two VC System trains are normally  ;

required to be operable. Under the 7 day action statement requirement of l the VC System Technical Specification, one system train can be operable and  !

provide the control room ventilation needs. The intent of the current )

Radiation Monitor Technical Specification is to ensure.that there is sufficient redundancy to detect a radiological event so that appropriate actions can be taken to protect the control room operators. The requested changes require two (2) radiation monitors to be operable in the VC system train that is operating. Under these changes, the intent of the Technical Specification will continue to be met. As such, the proposed changes do not affect the assumptions or results presented in the FSAR analysis.

Therefore, the probability of an accident previously evaluated is not affected. )

The consequences of previously evaluated accidents would not be significantly increased because the radiation monitor operability for the required VC system train in operation will not be decreased. The proposed changes are consistent with the applicable PSAR sections and analysis.

The changes do not add or modify any existing equipment, nor introduce a new mode of plant operation. The operability of the radiation monitors will continue to be verified by performing the related Technical Specification required surveillance. As such the possibility of a new or different kind of accident from any accident previously evaluated is not created.

The margin of safety as defined in the basis for the Technical Specification is not reduced because the two (2) radiation monitors installed in the operating VC system train are still required to be operable. If the first VC system train becomes inoperable, the second,  !

j redundant VC system train would be available to be operable under the seven day timeclock and it would require to have both of its radiation monitors operable. If this condition can not be achieved or maintained, then the control room make-up system would be started as currently required. The margin of safety is not reduced.

I 3801K

- _ _ _ _ - _ - _ _ _ _ _ _ -