ML20039B906

Summary of 811208-09 Meetings W/Util,Sargent & Lundy & Power Consultants,Inc in Bethesda,Md Re Issues Raised in Power Sys Branch Review of Fsar.Attendee List Encl

ML20039B906
Person / Time
Site:	Byron
Issue date:	12/16/1981
From:	Kiper K Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8112280036
Download: ML20039B906 (39)

Text

I 1

I s

MEETING

SUMMARY

DISTRIBUTION l

G. Lear Docket File DEC 161931 W. Johnston m

flRC PDR Local PDR S. Pawlicki N

TIC /NSIC/ Tera V. Benaroya o

p

.[,' Og %g.

A Z. Rosztoczy c

LB#1 Reading W. Haass i

6 j,'j< ;, geg/g/

n l'

'O H. Denton/E. Case D. Muller R. Ballard

?

D. Eisenhut/M. Jambor W. Regan n

R. Mattson 2A

~

' (1

~

B. J. Youngblood P. Check A. Schwencer F. Congel

/ M,1,

/

F. Miraglia

0. Parr J. Miller F. Rosa G. Lainas W. Butler R. Vollmer W. Kreger J. P. Knight R. Houston R. Bosnak F. Schauer L. Rubenstein R. E. Jackson T Speis Project Manager K. Kioer/S. Chesnut M. Srinivasan Attorney, OELD J. Stolz M. Rushbrook S. Hanauer 0IE (3)

W. Gammill ACRS (16)

T. Murley E. Adensam F. Schroeder D. Skovholt M. Ernst tiRC Particicants:

R. Baer

5. Cnesnut C. Berlinger K. Kiper K. Kniel W. Forney G. Knighton B. Doolittle A. Thadani R. Giardina D. Tondi M. Musko (AfiL)

J, Kramer D. Vassallo P. Collins D. Ziemann bcc: Applicant & Service List 8112280036 811216' DR ADOCK 05000454 PDR

c-s 2

.,7 g

DEC 1 F 1981 Docket lios.: STri 50-454 and STN 50-455 APPLICANT: Connonwealth Edison Company FACILITY:

Byron Station

SUBJECT:

SU.91ARY OF PSB MEETIllG A meeting was held December 8-9, 1981 in Bethesda, Maryland with representatives from Cocoonwealth Edison Company and Sargent & Lundy to discuss and resolve issued raised in the Power System Branch, Power Section, review of the Byron /

Braidwood FSAR. A list of attendees is given in Enclosure 1.

The meeting involved discussion of questions previously sent as Q040. - series

{

questions which were unsatisfactorially answered by the applicant. The status of the questions, as a result of this meeting, is summarized in Enclosure 2.

The applicant's written response to each question was handed out at the meeting and is included as Enclosure 3.

Kenneth L. Kiper, Project Manager Licensing Branch lio. 1 Division of Licensing

Enclosures:

As stated cc: See next page n)d n

I MB[y,hk/

DL[

DL:LB#1 DL:LB#1 omce)

KKriiEF791"". "

1GV65H..g.f.;,.,.3,y BT""

t uT"'"

• su m us>

.....s...............

1.2./.../.M........12/.}blAl........12/S./Bl...

orre y nac ronu ais tio-so) Nacu c24o OFFICIAL RECORD COPY usc.m. u_mu

2 Mr. Louis 0. De1 George Direc;or of Nuclear Licensing Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690 ccs:

Mr. William Kortier U. S. Nuclear Regulatory Commission Atomic Power Distribution Resident Inspectors Office Westinghouse Electric Corporation 4448 German Church Road P. O. Box 355 Byron, Illinois 61010 Pittsburgh, Pennsylvania 15230 Ms. Diane Chavez Paul M. Murphy, Esq.

602 Oak Street, Aot. #4 Isham, Lincoln & Beale Rockford, Illinois 61108 One First National Plaza 42nd Floor Chicago, Illinois 60603 Mrs. Phillip B. Johnson 1907 Stratford Lane Rockford, Illinois 61107 Ms. Bridget Little Rorem Appleseed Coordinator 117 North Linden Street Essex, Illinois 60935 Dr. Bruce von Zelb n Department of Biological Sciences Northern Illinois University DeKalb, Illinois 61107 Mr. Edward R. Crass Nuclear Safeguards and Licensing Division Sargent & Lundy Engineers 55 East Monroe Street Chicago, Illinois 60603 Nuclear Regulatory Commission Regicn III Office of Inspection and Enforcement 799 Roosevelt Road Glen Ellyn, Illinois 60137 Myron Cherry, Esq.

Cherry, Flynn and Kanter 1 IBM Plaza, Suite 4501 Chicago, Illinois 60611

s 1

2 ENCLOSURE 1 Power System Branch, Power Section, Meeting December 8-9, 1981 Attendees NRC S. Chesnut K. Kiper E. Doolittle R. Giaraina M. Musko (Argonne National Lab)

W. Forney Commonwealth Edison Company T. Tram J. Brynildssen L. Bowen J. Westermeier K. Ainger T. Weis Sargent & Lundy E. Crass K. Green T. Hottle Power Consultants, Inc.

J. La Vallee l

l l

l l

l

t 9

.2 Response Status Summary As s Result of December 8-9, 1981 Meeting Byron /Braidwood A.

Acceptable Responses:

040.89 040.109 040.129 040.92 040.112 040.132 040.96 040.113 040.133 040.97

-040.114 040.134 040.98 040.115 040.141 040.100 040.119 040.142**

040.103 040.121 040.143**

040.104 040.122 040.151**

040.105 040.123 040.159 040.106 040.124 040.107 040.125*

• Clarification of previous acceptable response

• • 0riginal response found acceptable B.

Responses Found Unacceptable or Further Information Needed:

040.93

~040.130*

040.99 040.131**

'040.101-040.139 040.108 040.140 040.116 040.154**

040.'120 040.158 040.126 NRC still evaluating response

• • PSB/ASB review item

, J ENCLOSURE 3 Applicant Responses PSB Meeting December 8-9, 1981 e-

Gi,

. :-:- 1 Question'040.89 - Supplement Engine mounted piping is designed to the Cooper-Bessemer standards which are indicated as DEMA Standards.

The piping furnished is ASTM A106, Grade B and is acceptable under ANSI B31.1.

The piping has been evaluated for seismic and wall thicknesses are dependent on both the seismic and service conditions.

The piping meets or exceeds ANSI B31.1 design requirements.

O 9

l l

l l

f

.~

t

(

.g.

W/ W 6 w d bot OCTOBER 1980

=

gDEST' ION 040.92

" Provide a detail discussion (or plan) of the level of training proposed for your operators, maintenance crew, quality assurance, and supervisory personnel respon-sible for the operation and maintenance of the emergency Identify the number and type of diesel generators.

personnel that will be dedicated to the operations and maintenance of the emergency diesel generators and the number and type that will be assigned from your general plant operations and maintenance groups to assist when needed.

"In your discussion identify the amount and kind of that will be received by persons in each of training the above categories and the type of ongoing training program planned to assure optimum availability of the emergency generators.

" Also discuss the level of education and minimum experience requirements for the various categories of operations and maintenance personnel associated with the emergency diesel generators."

RESPONSE

Twenty-six station personnel chosen from the operating, quality control and training departments at maintenance, Byron Station have attended a one-time basic maintenance Further course offered by the diesel-generator vendor.

personnel training on the diesel-generators. will be provided In addition, diesel by the station training departmer.t.

control and instrumentation instruction is planned for future-initial course offered by the vendor, and the

training, training provided by the station training department.

subsequent N k k#"d "hhNek"o h k h N kwhiduvel ng P%mm r

There are no dedicated personnel assigned to the diesel generator maintenance or operation.

Operation and minor maintenance and troubleshooting are performed by or under the cognizance of a licensed operator with an equipment Maintenance is per-attendant observing operation locally.

formed under the supervision of a Maintenance Foreman.

the above personnel Further qualification specifications for can be_found in Subsection 13.1.3 of the FSAR.

l

.4 Q40.92-1

~

i i

3 NRC (PSB) Question 040.96 - Supplement

Response

Question 040.95 requested that we " identify all working stations on the plant site where it my be necessary for plant. personnel to communicate with the control room.

-J. : :- 1 Question 040.96 requested that we " identify the vital areas and hazardous areas where emergency lighting is needed for safe shutdown.

nc...r.

These areas are not necessarily the same, i.e.,

a working station requiring communication may not necessarily require emergency lighting. Therefore, the answers to both questions are correct as is.

All of the areas listed in response to Question 040.95 are provided with some lighting powered from ESF buses except the following:

Manual Emergency Boration Valves 1CV8439 and 2CV843,9 Relay House Primary Sample Metrse h m b e* '

Secondary Sample HC'Js'B

\\

If emergency lighting is required in these areas, it can be pro-vided by the use of the portable battery pack lighting.

I f

I 11 l'l i I

.!i

~

L:

m

)

SAhotNT-4 2tM M 3

nu g as..s

$4visedi-11-Ob41 comanonwealth Sdieba company.. -

Sove ber 17r ilst.

Byron /Braidwood 9tetions.a..tinite:.1.4 I.

Stoject Nos. 4391/2. &

a 4683/4 8

i sac (Psatomastien 640.94 -:8uppiammah Tho areas _ requiring energency.11thiing 11et&d in:the responed. : -

do not correspand. ed.th -the areas ilsted in:Quemtian. eao.ss.

, Addrcae lighting requiremente for extended..periode.ed-time during loss of offait4 power and Atation blocketti Responsibilityt. 81L

. 9th (M. O Maesky3) j GriginaL Ratponse 9st

.speo. (N. As Mansins) c.

l Rampennen-1 Question.040.ss rikausstad-that m ldeistift 411 working.statieaa. <..

a em the plant site where.-it may be nectedery6, ret plant personnel... '.

to communicate with -the conFrel team w...

a puestion 640.94 esqueeted.that We 81dentift:the altil.Ar444 And noncedous. areas whare, emergency.11thiing '1A.needeer f at Aafe.

~ ~ ~

ahutdown v. 4 9hoco..areasetre not sectstarily. 64 6424 1.4.6 4 #eth.ingsetAtion -

2 ring:c - micat1 % *** mat AAe er

.1 u124-emer ties liine Kf& ency,,,h" 11 htin th As is.

g..

Therefore,.the answere to

• ~ ~

oorrac WerF aesas listed. a tesponde:

964Ablen.640.95 are Sectidhe:#1th.. lighting AS.

it.the.Ahtadh8E table..i n

l t

i l

l 4.Au;...

a 4.

1.si si s

/gg i

e a Ai sis. auad 4W i

a l

1 l

s I

u-g et Sommai.ite..

iackup ste.

Area-Baeuler At 8444 It3Y sc LtgInexa/or and f,te.. -

Liga shetery-

+,

Torhina Podestal..Areat.-

Units-1 & 2 e b *-

We Its 2 L

Manual 1me1eney h soration v fee ts h.

to s

1cv0439,a 2CV9439-

w.-

Spant Puel Poel.Arnae b

fed -

Tee' "

biasel Generators Uniis 1.s 2 :

fee TH 1 -

faa Anlay.Nousa..

b to te Aux..timet. hania.

Room.tinits 1 & 2.

• fet bi f44 4 19-(tsp):Sw Seem-Units.- 1 gr.-426.

fM '..

Yee n.

96 S.

i tadwaste.avavorator.

m e=aar 1

Centrol Panel Arte/.

fee f48 ' r p fee Primary Sample Reen. hi fGS I4 Me * " -

a...

$4dendary Sample:,.:.

Roma f44 I6 96

' t. -

c.,

L 1

47-8tator doeling~

PI:

1ial Unita-1 & 2 be fee '_.

4e 9

1

• Wetet sakteer task.Leeaked WithiA 166 feeb."

~-

. -=

Ques ~: ion 040.97 - Supplement The locations of the day tank and engine driven booster.a;. pump are as stated in the response to Question 040.22.

The engine driven booster pumps have been designed and tested with the fuel supply elevation lower than the pump centerline.

These pumps provide a sufficient suction lift to' ensure adequate fuel supply"to the injection pumps at all times.

22.m During starting, the injection pump for each cylinder is supplied-with' fuel oil from a small 5 gallon day tank located on the geherator end of the engine, above an'd between the cylinder banks.

A check valve prevents drainage of this small supply tank when the diesel is not in operation.

-Diagram 9.5.1 Sheet 1 has been updated.

e t

O hemmans u m ime i

i e

. Gi.

i 1 Question 040.98 - Supplement There are no internally generated missiles postulated due to a There are-twelve crankcase explosion or air receiver failure, in the crankcase of each engine.

In addition, explosion doorstwelve crankcase explosion relief valves relieve a primary explosion while protecting operating personnel plus preventing entry of fresh that could cause a secondary explosion.

Air air into the crankcase receivers are assumed to fail by cracking open to relieve pressure rather than fragmenting A two inch diameter Category II pipe supplies demineralized makeup jacket water surge tank.

A break i,n this line will water to the in a maximum flow'of approximately 325 gpm which can be result handled by the floor drains.

A\\l {g e r 1 rn e s in M e d i

' c eN %

4 Cadegceg _i Tnoderete ener% 1 es. TAe matintum site oT e

doe M5 I"

cd pesMdede$ (.pei-Ad b'e MO Wo lege less h 32s 37 m.

r O

e w

e

-7.__

B/B-FSAR AMENDMENT 28 f

OCTOBER 1980 OUESTION 040.100

" Discuss the means for detecting or preventing growth of algae in the diesel fuel storage tank.

If it were detected, describe the methods to be provided for cleaning the affected storage tank.

(SRP 9.5.4, Part III, Item 4)."

RESPONSE

Later.

J B/B-FSAR i

QUESTION 040.100

" Discuss the means for detecting or preventing growth If it were of algae in the diesel fuel storage tank.

for detected, describe the methods to be provided tank.

(SRP 9.5. 4, Par t III, cleaning the affected storage p

Item 4)."

RESPONSE

The station policy is to sample the diesel fuel oil monthly (SOAD) to Systems Operational Analysis Departmentthis time.

and send it Biological growth is checked at a biocide would be used to for evaluation.

If biological growth is found,upon recommendation of the fuel supplie control it, engine manufacturer, and the Technical Services Manager.

040.100-1 4

,p 0

Q40.100-1 t'

e 1

2

~yf & Mf*QA J

A zia 6

w kA A ' M '75 & fA,dt Md>@JM/p a watf Q,W,p d

M mu

~wp.

l n/ Apha

~,

@H A a W T't *s f

.p h M W 2~f

&n A si n a pux-a s

A WAp s -A J.7&A k

& /E s_ M 2Q

~

w ))

f.

/A A

, =,-

a f "pM sm ama A

~~zz J.4 s&

n A7 g' p.s ~ # p + $ rn /a s 9

M< h.s p

~

AA gm n p,r

a y

p

- a -x d-Yp

. Njf@jh gA W.

~

W... i

. W.

QUESTION 040.104

RESPONSE

As discussed in response to Question 040.19,. the exhaus6istack is the a. : :- 1 only-high energy line in the diesel generator room.

The maximum release from moderate energy line breaks c.an be handled by the drain system.

Line breaks in the steam tunnel will not affect the diesel

~

generators because the steam tunnel is designed to prevent steam'or water releases from entering de Auxiliary Building.. The. steam tunnel exit is into the Turbine Building.

+

e e

O 5

h-..',

e

~N.

A.**s own

• e,cc>p a

__M

~

ono tos ygd w

Lst de--

M h

S Ob i

R ML% 6 gj i

s d

G3.c.

P,ju R7 as&A t"

G rL

- M,,

u 4, y

d~AJ L y 6 u rw MR

',A e4 /

/L M. "

i 1

l i

~

.. ~. -

=

a

. Gi.

L ::- 1 0040.105

uc.. :-

We comply with Regulatory Guide 1.137 Position C2.

Excluding vent and drain lines, all fuel oil ~ piping is designed to ASME Section III Class 3 requirements in the. diesel generator rooms and fuel oil storage tank rooms.-

e 9

6 e

e e

O W

._m Gi' Question 040.106 - Succlement

-^

..:r 1 The' diesel oil storage tanks were sized based on a post-LOCA

- condition in which.the diesel generators experienced the following loading:. 100% for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, 75% for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, 50% for 118 hours0.00137 days <br />0.0328 hours <br />1.951058e-4 weeks <br />4.4899e-5 months <br />.

Using the fuel consumption numbers provided :by Cooper-Bessemer, t

the diesel will consume approximately 37',000 gallons of diesel

- fuel in one week based on this loading.

A review of the diesel fuel oil-consumption reveals the engine can operate for 5 days at rated load or 7 days at 75% load with the technical' specification limit of 47,000 gallons in the tanks.

1 I

l 4

t l'

t e

?

+

=

x 9

+

"g-o A

I J

O h O, i O ~7 blll

?-cA-t o cf, 'c swp Iin3

• /I wi a c c o e d e c e.

w e f /,

6. C,.

I, / 3 7.

b<-

it" i

j 1

=b l

~.g--~.-

4 2

=

'l i

i l

Question 40.109 - Supplement Gd The jacket water cooler transfers heat from the closed'lo6p water i

system of the, engine to the essenti. service water system."

A tube rupture would cause essential service water to enter the jacket water system of the engine sinea the service water system operates at a higher pressure.

The consequences-of this tube

?

rupture would be that additional water would be placed in the jacket water system, perhaps in sufficient quantities, to cause the volume to expand to the point of overflowing the standpipe.

Providing the overflow does not exceed the room drain capacity, there will be no problem.

The lube oil cooler interfaces the lubricating oil of the engine

.with the closed loop jacket water system.

If a tube were'to rupture, oil would enter the jacket water system due to the. higher operating pressure of the oil system.

Small quantities of oil in the jacket water system will have no detrimental effect.

The oil sump low level alarm will~ indicate excessive leakage from the lube oil system.

Failure of a diesel system such as lube oil or cooling water, does not affect the operation of the other diesel.

i I

l l

l-l O

i V

J o40.//2 A /J -

T/7e.

J i.e s a.J m 3 n <

coa /<h i

3 wJa e o r, o s i. n in b i bi7' >-

A

&z a s< cf J Gyeon i t/ bc A/A L CO 3nL whoe k

.c S !Y' " f* ' -

c on fM'n J rvIfr Y'Js N*r p 't 7^4;, ynonet i,

J c.

m.r <-

(g hw(fc.

(a w n Y wl h4 (t

En Ce t

040.//3 9

n=+ J~ fl A J4 :

Th<- r~ c car s

~-

y d e < c/op I

b~+

-i//

i,

e. tu J <-

VA <

m a.<-r a L e f e se's

, -pp /, 'e d

e. n y, n <.

r- - e..

e, A A., s.

T%.

di b s e./

a ng :n <

e o o flu, y de s y.s / ~~

<n. teu.~ n fn L d

c - n h a fr

ll

6. h& r

-. n fA t

,4 ~ ~ ;,,,

y i-e4 s

.e n..,

.,-. s

- c <a-it/ -.

t

, t, *,,.

p O

m

~

i s

?

i i-Question- 040.114 - Supplement s

The-top of.the standpipe is approximately 20 inches aboveithe cocling water outlet piping to provide for proper deaerat_ioni i

and thermal expansion.

The velocity in~the standpipe'of.3.65 feet per second is within the limits specified by Cooper-Bessemer 1

for deaeration.

The thermal expansion of 12.5 inches:can be accommodated within the 20 inch vertical measurement.

I e

a i

i i.

f f

I l

l e

4 e

'. k D

)

M e #

-n

p

~

al C Q O. I t c 0.;

f A-d d :

) 4 -e. A a r eLy -~f% s

/ //

tw e.

+N C

f 64 O ef

@O D

!C cr k

OM da, o

~5

.fs fla v ;n3 e se4 s<J A F " h., n. >

o -5 ' c an t. h a e us v.

i. a

., aa,.

~,

.L n.

y 5

6 --

(

~

~

s 9

s.

, s

,,4 s

g A6 s.s I

k

/,

a

-Q M

g,4'

• 4

,l' N

,; s.c

,2

• ,g

,m

/

I e.

d' f"

%e

'/

,r*

s S.

f

%P' M

w

%f

^~

__- ~_

N a

J F

.a s.

Gi.

Cuestion 040.119 - Supplement

..; r1 A low pressure alarm is provided on the diesel control panel but is not specifically annunciated in the control room.

Annunciation in the. control-room indicates a problem with the diesel generator y.

system but individual alarms are not provided.

A high pressure s

s alarm is not provided.

J

'4

%L

=

T

.a.

,% ~_

.4,,,

g,

T '

)

9 4'

g N

'\\-

4

\\

v r

's.

y N+%

- s.

s

~

e ne s,

e

• % mm d

\\

,v t,-

s I

F a 4 v

g, re'g 1W

\\

'f

%j

[3. 'S

'l i

'~ - y m

h

\\

\\

n.,,

s

\\

s e \\s p,b

(

a r.

's,, % q l my s

. 2

,S

• [.

g e

g

.s

,g4

.\\ s,* dp *e

'y

• s.

i.

i

,f+*

'N

+

t

• e e

,7 j,

t

• e

[-

j

\\

"g 6

g gw

, /\\

jMb as idg 9

b e

,q, r-n.,

r N

g ew y

\\

g

'q o'

6 b

e

)

" at h

' se

% s.

%s n

\\

3 \\

t g

e

4 O 4 O, / / */

i

,,,,. s,< n * ~

A Ad :

r-sfin 3 f

cJ-s-t t,, s p fn-.4 c{u ein3 L

7hA Sr e.

o n,% fy s - -i// n ea

~

f4 l 3&

} % W%

&3.

gp l

l l

l l

l l

l l

l l

gy a'MW eim^+6 4

4hMP*

w-w

• P

2 O

V Gi.

Question 040.121 - Supplement Figure 9.5-3 will be revised.

M.. T.

a f

i 4

e G

1

4 C7./2.2_

8 /c{ :

T) e 6s -a /

/wG e.

oi i

~ s'I /

b<-

s a- ~ p

e. {

t

?A y ik en. c e a r-d~ c <

& s., 4 e.e /y a.

d m

a.,

wl t/,

/-f.<

r-e e.

m.-n / J. 6,, r VA -<-

,(, e s e / 3 -., &v s'n s t r ~ e 1. b s.,

Is.. 4.

c a & e.

o,' /

/ ca.A. 9.<-

o 6.s

- v J t e.

.,s vir s<341 3 ~ z.i,

t.

l-f J ~,-

,vls.<.J

/

s bs er <3a <,

.?

/ f.o n a jn eA c f w~rw e

~ p /c 5 s: a

=& % %'[.L.

/

t '.

B/B-FSAR AMENDMENT 29 FEBRUARY 1981 gTION 040.123

,g

..e fy, '

"What measures have been taken to prevent entry of

-i.

deliterious materials into the engine lubrication oil system due to operator error during recharging of lubri-Y cating oil or normal operation.

(SRP 9.5.7, Part III, Item 1c). "

RESPONSE

l m

i oo.erkeY a.7rg i-e b gro'edure

~

x usg'-

~e t

u s

a g _- a,, conc dAreds u neceq ry.

Ance M 2 hasMownpat pmpJp *y n xp

- -o il ic vell i t-h i n\\

en_.

capability.

01\\ ad.ddfw 4,o4ke dsese\\s (A'th be, dtMed'k sNtovs pem%e\\ A wue beew bo cvs ed os Aesenbed W Qoeshovs 4o.9a.

\\ k$$

mmn W5

\\N1\\ttde, etn)\\\\ctsis ow4k deo.whess qmmweds b kbe dd odd &6n.

Ne wo.nv.Qm.eg qu.mieds sw 4bs C'n-w u m % m asaea 4 msu.=,m er m = 6 m mee e4 We disseb.

4 O

9 9

e e

S

=

I sw 040.123-1

a Question 040.124 - Supplement The full-flow lube oil filter contains 146 replaceabi'e, elements which operate in parallel to give the required capacf'ty and degree of filtration.

The elements are 16 micron and are nominally 2-11/16" diameter and 27" long.

During normal running conditions with the lube oil at operating temperature the pressure drop through the filter will be approximately 5 psi.; TThe elements are replaced when the differential pressure reaches 20 psi.

A high prescure alarm is set at a differential of 25 psi.

Two oil strainers are mounted on the auxiliary skid in the oil header downstream of the filter.

The strainers prevent any foreign particles such as pipe scale, weld slag, rust or debris from a ruptured oil filter from entering the engine.

Each strainer element is a 150 mesh wire screen made of 304 stainless steel.

e

C + d. / 2. b Add:

Lu.fo.e.

. s.' 1.syst<~

r A s te n m n t %. %

c o n% l.s wi ll be f +s h of k nIng Te c. I, Sp-e.

m a n + h f s a r-v e i I f u < <.

of f-N-<-

ch<se.f g n w ~%s.

l l

l l

I f

. ~.. - -.

4

-s

?

9 4

4 I

Y Question 040.125 - Sucolement

. Gi.

Oil from the turbocharger is returned to the engine sump bv ' drain I

piping.

i

- a.%..

.2 l

l I

I i

l t

i e

l i

l l

I

-~ _ _ - -... _ _. _, _ _ _ _ _ _ _ _ _ _. _ _ _. _ _ _,.,,.

mua w

m

~m

---,----ma.w-

.Mm-s

_,.w-.a A

_a,,

a a,m a.,a

.a am.a a

-.u s-s

-s.-

a

,s-.-

s.m.

l l

o40,/29 l

A d/.

TA.c.

a<e in fJr.

s

=.v b.-- z Y

~,

\\

(/

4e

%., f. af s y.5 Y~

h sh.n - n f~ C n wi i

i

$w t en k.e

/ e-c k m o r, f k ec i

s n r v e < { lc-n c <.

f k <-.

edt e.r < I y c r7 < r 3 r.c.

e s

I i

a 1

i a

P I

l e

l

a 6

. s QUESTION 040.132

RESPONSE

• J The diesel generator air intakes (combustion and ventilation air)

.u_.

are completely independent for the two redundant diesei" generators.

The air intakes on the Auxiliary Building roof are separated.

In the event of complete failure of an intake fire damper, the diesel generator room vent fan could continue to run until the diesel generator was shut down or until closure of exhaust fire dampers caused an increase in exhaust pressure.

When the fan is tripped, the motor operated intake dampers automatically close.

As a result, it is not possible for the smoke and CO t

travel out the air intake.

2 O

e i

l l-I e

l' 6

l

+

...i QUESTION 040.133

RESPONSE

Air filters are provided in the combustion air intakes.

Louvered enclosures on the roof of the Auxiliary Building will. minimize the dust reaching these filters.

The diesel-generator room HVAC system air intake is also located on the roof-(in'the same louvered enclosure) but is not equipped with filters.

Most of the diesel-engine-generator control equipment, located in the. diesel-engine-generator room, is mounted on the engine-generator control cabinet, which is a NEMA Type 12 (Dust tight) enclosure.

The remaining control equipment (level switches, thermostats, pressure switches) is mounted on the engine-generator unit in Weatherproof, NEMA 4 (Duct tight), and NEMA 7 " Explosion proof" (Class I, Division 1, Group D) enclosures.

All major construction in Unit 2 (which would generate concrete dust) will be complete before Unit 1 goes into operation.

The diesel-engine-generator local. control panel will be cleaned of dust prior.to operation.

Thus, due to the outside location of the ventilation air intake, the control equipment enclosures, the short time interval between the Unit 1/2 schedule, and the general house cleaning; accumulation of dust (from Unit 2 construction or frcm any other source) on electrical device contacts is not anticipated.

4 134

. Gi.

Question 040. W - Supplement As can be seen in Figures 0040.134-1 and 2, the relief valve stacks are located approximately 31 feet from the air intakes.

The stacks are 28 inches in diameter and 1/2 inch thick.

A tornado missile will not impart damage on these stacks which would affect diesel generator aperation.

.a NRC (PSB) Question 040.141 - Supplement

Response

Drawing 6/20E-1-4026B, Revision A, transmitted to Mr. Giardina by Sargent & Lundy (B. G. Treece) letter dated December 1, 1981,.

(copy attached).

f e

e l

)

l 1

j 1

I l

n J

=0 0P

~

.=

0040.159 The turbine bypass (steam dump) lines are located along J-line above El. 426'-0", next to the condenser.

The location of t'e turbine speed control sensors are on E_. 451'-0",

a on the turbine.

A line failure may affect the electrical or hydraul,ic, portions of the overspeed trip devices however, failure of the hydraulle portion will automatically trip the turbine.

The mechanical overspeed t

trip device will not be affected by any line break.

There are no safety related systems inside the Turbine Building.

e S

e '

4 e

e O

_