ML20126E532

Responds to Request for Addl Reactor Depressurization Sys Batteries Data & Test Results.Info Needed for Evaluation Re Util 770304 Proposed Tech Specs Change to Lower Allowable Battery Specific Gravity Limit.Exide Power Sys Info Encl

ML20126E532
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	10/21/1977
From:	Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	Desiree Davis Office of Nuclear Reactor Regulation
References
NUDOCS 8102040270
Download: ML20126E532 (6)

Text

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Consumcrs

' mr fiGihliiOP.Y D:05.~.~.'.00?y i

Compani,

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Generas offices: 212 West Mecnigen Avenue. Jackson. Michigan 49201. Area Code 517788 0550

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Octbber 21, 197T DN, p.

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Director of Nuclear Reactor Regulation f

Att: Mr Don K Davis, Acting Branch Chief g 00T2 6;g77m Operating Reactors Branch No 2 u.s. %,

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US Huclear Regulatory Ccenission Washington, DC 20555 DOCKET 50-155 - LICrtSE DPR BIG h

ROCK POINT PLANT - ADDITIONAL DATA ON RDS BATTERIES By letter dated March h,1977, consumers Power Company sut=itted a proposed change to the Big Rock Point Technical' Specifications which, when approved, vould lover the allovable RDS battery specific gravity limit to 1.15 Subse-quent to this submittal, the staff indicated that the results of the RDS bat-tery dische.rge and service tests would be necessary to further evaluate the proposed change. During the recently ecmpleted refueling outage, these tests were conducted (in accordance with I m h50). The results are si"-wi ed as fallows:

Rinimum Voltage Capacity Determined by Battery During Service Test Perfornance Discharge Test UPS-A 119,21 VDC Overall 126.3%

UPS-B n9.lT VDC overan 126.6%

UPS-C 118.81 VDC Overan 134.2%

UPS-D 118.6T VDC Overan 120.0%

The results of the service test indicated that the RDS batteries have an ex-cessive reserve capacity since they did not even approach the limiting condi-tion of 105 VDC. The discharge test further corroborated this by displaying overall capacities of at least 20% in excess of nameplate rating, or almost four times the capacity necessary to meet the conditions specified for the design basis load cycle. Further, the discharge test was conducted with two ve%Kened three-cell units (one in UPS-B and one in UPS-D) that have subse-que!!tly been replaced.

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2 Although both tests were conducted with initial cell specific gravities of 1.20 or greater, the results, when evaluated in conjunction with the vendor's study (provided as an attachment to this letter), indicate that a specific gravity of 1.15 is adequate to ensure that the RDS batteries have the capacity to per-f0rm their design function.

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David A Bixel Nuclear Licensing Administrator CC: JGKeppler, USURC 1

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fxjhc EXIDE POWER SYSTEMS DIVISION ESB INCORPOR ATED, 12717 PROSPECT STREET. DEARBORP1, MICHIGAN 46126 Qt3) 5410400 February 2, 1977 P"

tiichael Johnson 0:xtsumers Power Corqxtny 212 W. Michigan Avenue Jackson, Michigan 49201

Dear Mike:

Please note the attached enclosures, which we hope will answer your letter of January 17, 1977.

I have also sent this infonnation to Joe Flynn for his request of the same infornation.

Feel free to cal me if any additional information is needed.

4 Very truly yours, EXH"E POWER SYSTEMS DIV.

, ESB INCORPORNIED

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1 cc: Pollie Boorsma I

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ESB INCORPOPm ED I/~8B' i

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.visoc, Philadelphia Plant r

Philadelphia Plant i,

I"*"c Consumer Power Co.

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P licKin s t ry o

F.W. Ilopkinson Dig' Rock Huclear Plant u e u o e. 4 6 n v v.

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$r. App. Engineer Ref. Itr. JUA to RHcK f/24/li7 C C TO:

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7 A.R. Abbott 1/27/77 J,.U. Anderson EiM. Strohlein

[1ECEi'VED J-Tomm - Detroit District KA.Vagner FEB - 1 'i977 g-vinr. OCTROF The following tabulation. lists the ampercs for 30 minutes to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> discharge In the ranges requested 1.150 to 1.200 sp. gr. at 77'F. when cells are fully charged - Cells type 3-CA-3.

Ampercs Discharne to 1.75 VPC

-Sp. Gr.

8 lir.

5 Hr.

3 Hr.

1 Hr.-

30 Min.

1.200 6.10 8.50 12 35 25.03 33.60 1.190 5.89 8.21 11.92 24.10 32 30 1.180 5.68 7 92 11.48 '

23.10 31.00

.1.170 5.46 7.59 11.0 22.17 29.68 1.160 5 26 7 32 10.58 21.24 28.35 C,-

1.150 5.04 7.00 10.13 20 33 27 12 Sizing calculations using "K" factor In' l.150 sp. gr., worst case.

UPS "N' (3rd period critical)

UPS "D,. C & D" (2nd period critical)

See attached work sheets pg. 1 & 2.

The work sheets submitted dated 1/17/77 sized by MLJ are using a lower "K" factor at 58 & 59 minutes than I would select; 1.800vs 1.890 which in effect gives a high AH requirement in UPS "A" and a lower ampere hour requirement on UPS "B, C & D".

In any event the 3-CA-3 in 1.150 sp. gr. when fully charged has sufficient capacity to carry the loads sirice the ratinD at the 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> rate would bc 40 ampere hours.

The load ampere hour requirement increased approximately 3% when changing from 1.215 to 1.150 sp. gr.

The subhect letter attachments are returned to R. ficKins.try.

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=rf' Ioad Change In Daration Ti:me To Erx1 T ltin. Rato (3)?(6A)= Poaltivo i

A (Ar.peras) i Ioad of Period.

Of Section (6A) A=pa/Poo.

Or i

(A=pe res )

(ainutes)

(Kinutes)

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<T6D) x Ps ete r -

- _-t ion 1 - F i rs t t+riod Cnt.s - It A2 is er**'ater tA:n A1, eo to Sc tion 2.

J ren. va.l..u.e Js... e y.

n 1

lAl=

?Al e n1=

l==:11 =

l 1

=.

soc. 1 Tetsi l~~~.~~~.'

--tf en 2 - r f *-t _- :2.Iwic<is c.1 * - If A3_,M_,gr9 ster..the.n. A2, eg t.o Coctien 3.

1 Al-i

[A1 dMI-1'ta! Jew,2 =

l I

> ~

n-

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tm=

sw=

l t

n

=

,00c.

S.* h '*e t. f 2

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Jen 3 - r % e_ :a.ryae::igq_caly - T 7 4 1n e r. cat.cr ths.t.33. e.t q.:;cvtion.4.._

t 1

lAl=

t_f iAl-o=

s.C f r.) = #

' t,'=.ylf.c_-H3 =

(2. 3 i+ 9 83 14.348 1

n-

'I th2-A,1= - S is =

I w.21u3=

3n I.970 I (,, >.~

43=

A kA3.,32=

3 h tt3-.fA

"'* t 3 =

J'6

/. 9 5~0

!. 9 CO 4

4

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soc.

sus ~e '

11. 2 9 W I6./<

z 3

• • ti l

11'. / e t/

d 4

3,(pa,,f,. - Piryj;;.7ou,r Periods o,1v - 7

• A5 1.q,,,sa'ar._tttn.J 4, eo to_SNtiqn 5.

1 Ala (al-o=

D'.1=,

1 =x1.+.. x4.=

T

__ 2 52=

p,2.-A.1 =

c r.2 =

m'=M.233.+tt4 =

3 M=

CA3-A2=

{H3=

t ' '-;e.3_+H4 =

4 -..;A4=.

. j nc-u..=.

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IT=M4=

s

,. goc, tnh m*-

I p

ma. i i

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-..i.on 5 - ri. st riv.,o Period:: Cr1v = vf A6 fu c-ari. tor than AS, eo to Se-tion 6.

r:-t 1

Al -

e. A l-, =

i,n M.1=

I M.1+...M.5-1 I

-. 2...

M=

l '.2-?.1=

k'H2=

icau2 +...E5 =

1 l

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133-A2=

dij3=

Q:-Q-N4,+M 5 a i

4 A4=

c A.;-AJ =

C. H.4 =

l-wW e. 5=

5 AS=

4*A5-A4=

i.H5=

1 wtS=

Sec.

,R'6b, To t.

f

-l, 5

'2b tc1 1 * *

==t. ion 6 - Pl_rst Sir Pe.ried: Oniv - If A7 f r. cro s tcr_th.n 7.6,,,_go_,t, o,_Ccction 7.

1 Ala Q1-O=

4 !!1=

Ol+...!'5 =

I 2

A2=

y 2,,,3,,1 =

(I:2=

. M.2 +... M6 = _,,,,,.

t 3

A3=

1A3-A2=

fM3-T-?d,3 +... M5 =

r

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A4=

2 5.5A3=

4..'

A5=

e,. M4.=

N.Ni4+M N 6=

.E, AS-A4 =

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• p '.5.+.H. =

5 A

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• A 1 6-A5=

rtM6=

?='. % =

1 l

Soc..

Cu b.T.o t.

6 Tots i-

== tion ~7 = Tir:it Seven PEEied~CM...~.l..f. A. 8 10 etre$tcr than AY cies to Section 8.

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,1,_.,,,,. Al =..

A1-O=..

ht1=

' *;'=M1 +...M7 =

I 2

A2=

A2-Al-1 g n2=

T=rt2+...H7=,

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3----"- X.3'=

A. 3. A2. =

, K3 =

T=$*3+...H7=

4 Ada A4 A3=

H4=

MA +...M7 =.

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1

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ns-T-x5+ 9H7=

s-'

Asa iA6.-A5=

ps=

H6+M7

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hp7=

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500.

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1 marinca section 512o (8) /b /h+ nandocr. dection 5120 (9)

= tracorrected Sito = US (10) /.l' NI/.

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Cot'r Dr.9/m M*=*In IIS Q X ;.:::,,,:/ ract. (12)

X 1":' '*~""W (13) 1.

X Ageitsg ractor (14) 1.

(15) ethsn the cell sito (15) is gieator than 101t c a ot.an:!srd cell size, the next hrger cell in requ' Ired.

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Raquired cell size (It.)

g '((A)-twnitivo Plates n) Accare slours:) neroforo co11. (17)

?. f. F. *t is required.

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Capacity At Required Soetion n

riE* ~

Imd Change In Duration Tf.:ae To I:nd T ltin nate (3)+(gal = positive ;

(Panperas)

Imd Of Period.

Of Section (CA) Ac:pa/7oo.

Or (At p'rre.a)

(611nutes)

()11nute.3)

Or _. ~

(3) r (4) = P ated A,.

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Pos. Values

-tion 1 - ri rit Po ric4 Cn) v - If A2 _1 s erroa te.r t.ha n A1, go t o Co rties 2.

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lA'170-fH1=

IT=H1=

l l

l

=

a 1

lAl=

Soc. 1 Tots 1

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i

=

e' ~

- fn,? - ?! Q 7 a m icd 5 c-l r - If A3_,,Lq.,g:cster,,then A2. co to rection 3.

1 A 1 = C 3  ; 31 r,-

6 5 6 Emla 2-l ~C**,19 2 =

60 I.96.3 I i2939

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A' =

@ ') *.' - u - I. t (. *?

M 2= 66 ia-w2 -

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7 t>f Soc.

pab 'aot.l 15"..it i W i

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--+1c.n 3 - ri :t T.rp_r; riec _%__ - T r.4_i s_ c oatc.r_tMrt.,

3.

c.> tq_sc c1; ion.4 t

A 1

4=

pl-o=

yt1=

i.=J.1232fM3 =

1 I

7 A7=

] A2-Q=

t K2..

a =*e.2Jy3-8 3

rg =

g.q-32=

4t3-a m3-

6 St-l Sec.

3 awt-1 i

~tio*1.3 - P3 t.t_ l'.au,r_ Par _i_ods On i r - I,f_,IJ.,,[r ST.;_3,,";:f,,than..A4, en tq f.;q.icn 5.

E

,J 1.1 =

f A 1 ~,0=

3 ti1=

t T.= M1,+.., H 4 -

_2 A2=

{82-A.1=

m2=

l 5 12+s3.+t(4=

3 A3=

p3-A2=

M3=

I T,,j=.3,,+N4 =

1

~

.4.... M =...

.jA4-^3=

jM4=

f T=:*

1

soo, e1 + -

1-7 o

=;o v. s l

e. w

..t.i.on_5 - ri. st rive, Pe riods c-.1v.. If A6 in c ra.ter than AS, eo to reetion 6 1-Al= -

p1-0=

Qt1=

lyL14...,t;.5 =

a

,2 A2a

!!.2 9 =

{M2=

le-:'2 +...fi.5 =

8 1

1,3-A2-

.g.3 =

• m t3p.,+x5=

3 4 A3 =

2 I

4 u=

p 4-u -

5 x,4 =

g.:y.s =

l s

.n-

. A s

.4 =

,: e.s =

as=

1 l

Sec.

,jMb_ Tot.

I 2

_5, Total I

-tion 6 - ri.rr.t Sir Perieds Oniv - If A7 is c-reater,_thn A6, Jo,,to Section 7.

3 M=

i Al

'h=

IHlu Twy.1+... !:5 =,

i 2

A2=

,1A2-Al=

.v IL2 =.

T=M2+...M5=

3 h3=

_ l A.3... A2 =

4, H 3 =.

T=.n. 3 +... t%. =

4...

A4=

{A.4-A3=

! !'4 a

=.v.4 +M5 +'4 5

6 5 '

AS=

iAS-A4-r M5=

T=M 5 +ni-(

G A6-IA6-A5a 5H6=

T=M =

l sec.

cud Tet.t 4

c

• %til I

i e

• tion 7 - First seven Period,s on.ly - If AG in greater tMn A7, go to Section S.

lld="

';'.=.M 1 %..J i7 =

I I

1, _ _,.

Al,

,, lAl-O= _

I

't A2=

,,I A.2 - A l =

lM2=

M !2+.,..M7=,

3-----"

A_3 -

l A. 3 A. 2. =

I T=M.3 +... M 7 =

tt3 -

i r

e' A4=

A4-A3=

'H4=

T=?t4 +...M7=

5~~~~

A5" M-A4 =

H5=

T-H5+R5tH7=

'i~~ ~~

AG=

A6-AS=

{M6=

T=M64M77 I

7'*

l A7-

< A 7 -M -

- - ~ ~ ' - -

' ',, 7

-EM7=

=*17=

l Soc.,Sub Tot, 8-7 Total a

kvu tqui eent Imd Only (1f noedad) t

- [An ::

f A.n o2 -~

^ g ait-

{T un=

1 i

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{

azimum section si:o (a) If.2 I ti + nando section si o (9)

= eneerrected size - os (10) #5. 2 1 y.

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Desun Monen

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x cf ; :2 (12 )

x D.* N i (13) 1.

,x Againg rector (14) _1.

~,,(15)

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t>en the cell alto (15) is greator than lois of a otandard call oize, the next inrger cell is required. "~ ~

t equired call size (26 ), g *g gq ((n)-Ac;mre Hoexs)Al-im itIvn_,yloton. PC b '4' is required.

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DISTRIBUTION AFTER ISSUANC JF OPERATING LICENSE

'l u.s. Nucts An nsov6Atem y c:Muissi N occxsT Nuusan M p7su 195 f4 - /ff ts-7s NRC DISTRIBUTION sem PART 50 DOCKET MATERIAL I

r FROW TO: Mr. Don K. Davis Consurers Power Co.

21/77 Jackson, Michigan 49201 David A. Bixel

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sue:.osvas y Consists of tests results and i

additional data on the RDS batteries...w/att supporting'informatioh Evide Power Systems Division...

2p + 4p

FW NAC BIG ROCK PLANT t

.jcm10/27/77

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FOR AC ;CN/INFORMATICN 6

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