ML19309A612
| ML19309A612 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 06/16/1972 |
| From: | SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | |
| References | |
| NUDOCS 8003310496 | |
| Download: ML19309A612 (4) | |
Text
-
l 4
'o AEC DISTRIBUTION FOR PART 50 DOCXET MATERIAL (TEMPORARY FORM)
CONTROL NO: 5535 FII2 FROM: Sacramerto Municipal UtilitEATE OF DOC:
DATE REC'D LTR MEMO RP2 OTHER District Sacramento, Calif.
6-16-72 10-11-72 TO:
[
SENT LOCAL PDR F
'AEC 2
CLASS:
, y PROP IKIO INPUT N0'CYS REC'D DOCKET NO:
2 50-312 DESCRIPTION: No Letter Of Transmittal Rec'd..
ENCLOSURES:
Information On Coolant Radwaste System.....
DISTRIBUIION PER B. MANN ETS 10-11-72 (2 cys enc 1 rec'd fm B. Mann ETS on 16-11-72)
,J e
PLANT NAMES:
SMUD
'p, -
sy FOR ACTION /INFORMATION O4 iO - it "I &
BUTLER (L)
KNIEL(L)
VASSALIO(L)
ZIEMANN(L)
KNIGHTON(ENVIRO)
W/ Copies W/ Copies W/ Ccpies W/ Copies W/ Copies CLARK (L)
SCHWENCER(L)
H. DTJiTON' CHITWOOD(FM)
YOUNGBIDOD(ENVIRO)
W/ Copies W/ Copies W/ Copies W/ Copies W/ Copies GOLLER STOLZ(L)
SC'1EMEL(L)
DICKER (ENVIRO)
U/ Copies W/ Copies s/ Copies W/ Copies W/ Copies T77PUNAT, T)TS'T'RTWTPTO?T hbFTD TECH EVIEW VOLUER HARLESS WADE E
FA3C FDR Er.aW RIB DENTON SHAFER F&M OGC, ROOM P-506A SCRROEDER GRIMES F&M BROWN E
FUNTZIt'G/ STAFF MACCARY GAMMILL SMILEY G. WILLIAMS E CASE LANGE KASTNER NUSSBAUMER E. GOULBOURNE L GIAMBUSSO PAWLICKI BALLARD A/T IND BOYD-L(BWR)
SHA0 FINE LIC ASST.
BRAITMAN DEYOUNG-L(PWR)
KW2H SEWIICE L SALTZEN SKOVHOLT-L ST 2IO ENVIRO MASON L
P. COLLIIE MOORE MULLER WILSON L
PLANS HOUSTON DICKER MAIGRET L+
MCDONALD REG OPR TEDESCO KNIGHTON SIETH L
DUEE FILE & REGION (2)
IONG YOUNGEIDOD GEARIN L
FORRIS LAINAS PROJECT LEADER D~3GS L
INFO STETTR BENAROYA FEE 2S L
C. MILES I2?
L b-EXTERNAL DISTRIBTTPION Mnnm
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/
/1-IOCAL PDR Sacramento. Calif.
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1-DTIE(ABERNATHY)
(1)(5)(g)-NATIONAL LAB'S
<-PDR-SAN M 1-NSIC(BUCHANAN) 1-R. CARROLL-0C, GT-B227 1-GERALD LELIOUCRE 1ASL3._ YORE /SAYRE 1-R. CATLIN, A-170,-GT BROOKHAVEN NAT. LAB E00DWARD/H'.ST.
1-CONSULAN2'S 1-AGMED(WALTERK0 ESTER, 16-CYS ACBS HOLDING NEWMAK:/BLUME/AGABIAN Rm C 427, GT) l 1-RD... MULLER...F-309GT
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INFORMATION ON COOLANT RADWASTE SYSTEM
. ?,
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~.:
1.
Flash Tank q.
A A
'9 1500 gallons Capacity Normal level 750 gallons
./.
Operating pressure Atmospheric 120 F Operating temperature Venting rate (at 45 gpm) 0.1 SCFM 2.
Coolant Waste Receiver and Holdup Tanks Air is drawn from the room through the tanks, which are directly connected to exhaust ducting, to the Auxiliary Building stack.
Air flow (per tank) 100 SCFM, Normally the tanks will not be recirculated.
If they are recirculated, the maximum flow is 100 gpm.
3.
Estimate of Gaseous Releases:
Although the diffusion mechanism is very compicx, the following 9I 4 calculations provide an order of magnitude estimate of the escap g of gaseous nuclides from the liquid in the tanks to the vapor Perry, " Chemical Enginccrs Handbook", Third Edit: k, 0
Reference:
j 07,
T.
pp. 538-540.
072 % $
l.~
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QI Oc e NA = -D g g
E' A = lb - moles of component A diffusing /(hr.' (sq ft) 4 N
C-D = diffusion coefficient, sq ft/hr
',/ k h k %
c = concentration, Ib - moles /cu. ft.
- ps -
a = distance, ft.
//
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x<
e Diffusion coefficient for hydrogen gas in watar at 20 C.
o
's.
/h cm /sec
{:?
el 2
D20 = 5.13 x 10-5 C
/
o D increases about 37. for each C.
&x 2
50 = 9.76 x 10-5 cm /sec D
i 1
m535 lh
r 3
e Concentration of H2 in coolant wastes assuming 30 cc/kg H2 in coolant and 507. removal in Flash Tank:
3 3 H O)' x ft /28,300 cc C = 15 cc/(kg H O) x 28.3 (kg H O)/(ft 2
2 2
3 3 H )/(ft H O)
=.015 (ft 2
2
=.015 (ft3 H )/(ft3 H O) x Ob - mole H )/(359 ft3 H) 2 2
2 2
= 4.18 x 10-5 (1b - moles H2),'(ft 3 H O) 2 2
o Assume tank 4.s-full. This ssves -maximum.ourface area-of 50 ft,
Then total H2 in the tank is 3
3 30,000 gal / tank x ft /7.5 gal x 0.15(ft3 H )/(ft3 H O) = 60 ft H2 2
2 e Conservatively assume that diffusion is-ac.ross the top 1.0 cm
(=.033 ft) of H20 Then:
2 2
2 NH2 = -D
, = - 9.76 x 10-5 cm /see x 3600 sec/hr x ft /920 cm x 4.18 x 10-5 (Ib - mole H )/(ft3 H O)/.033 ft 2
2
= 4.85 x 10-7 lb - moles H diffusing /hr/ft2 2
e This is the maximum rate at start of diffusion and in terms of
~
fractional diffusion per second will be:
4.85 x 10-7 lb - moles /hr/ft2 3
x 359 ft /lb - mole x 1/60 ft3 H2 x hr/3600 see x 750 ft2
= 6.05 x 10-7
-1 (H )
sec 2
Assuming that diffusion of other gases is inversely proporti,nal 4
e
.j to the molecular weights, then:
g..
Fractional diffusion of Kr85 is 6.05 10-7 x M = 9.30 x 10-8,,e-1 Fractional diffusion of Xe133 is 6.05 x 10-7 x /T/I33 = 7.65 x 10-8,,e-l' 33 e Assuming 11.2 pCi/ml Xe and.328 C1/ml Kr85 (FSAR, Table 14Ltd,
then total curies in 30,000 gallons is:
30,000 gal x 28,300 ml/ gal x 11.2 pci/mi = 1,280 Ci Xe133 and 30,000 gal x 28,300 ml/ gal x.328 p01/mi = 37.4 Ci Kr85
r'-
()
-l e Then the maximum escape rates are
'Xel33:
7.65 x'10-8,,c-1 x 1280 Ci = 9.8 x 10-5 Ci/sec Kr85 : 9.30 x 10-8 sec'1 x 37.4 Ci = 3.48 x 10-6 cif,,e
+
Conservatively assuming continuous discharge at the maximum rate, o
then the yearly releases are Xe133:
3.15 x 107 sec/yr x 9.8 x 10-5*Ci/sec = 3,100 Ci/yr Xe133 s
Kr85 :
3.15 x 107 sec/yr x 3.48 x 10-6 Ci/sec = 110 Ci/yr Kr85 e
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