ML19289G079
| ML19289G079 | |
| Person / Time | |
|---|---|
| Site: | Crane, North Anna  |
| Issue date: | 05/02/1979 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| OLP-790502, NUDOCS 7906260218 | |
| Download: ML19289G079 (8) | |
Text
- ~.
e : ~;
PERCENT OF TOTAL CORE RELEASE A.
Basis and Assumptions (1)
Primary Coolant sample Analysis taken on 3/29/79.
C -137 270 pCi/cc s
CS-134 63 f.pt/cc I-131 1.4 x 104 gCi/cc (2)
Containment Air Sample taken on 3/31/79.
Xe-133 675 ytci/cc Xe-135 8.1 JgCi/cc I-131 0.063 gCi'cc (3)
Origen Code (3/29/79) 5 8
CS-137 9.496 x 10 Ci Xe-133 1.164 x 10 Ci 5
,3.5 C3-134 3.457 x 10 Ci Xe-135 1.512 x 10 Ci I-131 5.8 x 10 Ci (4)
Total Primary Coolant Volume 8
85,000 gallons or 3.217 x 10 cc (5)
Total Containment Air Volume 2 x 10 ft3 or 5.7 x 1010cc (6)
I-131 in Centainment Air 10 0.07: ypi/cc (3/29/79) x 5.7 x 10 cc= 425 Ci (negligible)
(7)
Approximately 207. of iodine and Cesium released from fuel is plated out within containment building.
(8)
Amounts of I-131 in Auxiliary Building Sump (3/29/79) is negligible.
(9)
Amounts of Xe dissolved in the primary coolant and containment sump water is negligible.
(10)
Total amounts of Xenon released during first 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> are 6
ro :imately 0.5 x 10 Ci (11)
Tocal core inventory of 1.sotope 7
I-131 5.8 x 10 Ci Cs-137 9.5 x 105 Ci
, -r 251
!za 5
C -134 3.5 x 10 C1 3
1.16xig8 Xe-133 Ci Xe-135 1.5 x 10 C1 (12)
Reactor Building Sump centains 30,000 gallons of water.
f oi.)nt" ?' $$
q
B.
Calculations (all activity valves are valid on 3/29/79 current values must be corrected for decay)
I.
Upper Bound Assume RB Sump activity at same concentration as in the RCS.
l a.
1-131 l
0 8
4.5 x 106 RCS 1.4 x 10 pCi/gm x 3.2 x 10 g Ci
=
RB S ump 1.4 x 10 pCi/gm x 1.25 x 10 gm 17 x 10 Ci
=
6 Plateout 4. 5 x 10 Ci r
Total I121 Released 26 x 106 Ci Fractional Release i
2.6 x 107 5.8 x 10',
x 100 = 457.
Sumo Ccncentrations 0
1.4 x 10 pCi/cc b.
C -137 s
8 5
RCS 3.4 x 102 Ci/gm x 3.2 x 10 cm 1.09 x 10 Ci
=
9 5
RB Sump 3.4 x 102 3Ci/gm x 1.25 x 10 ga 4.25.x 10 Ci
=
Plateout 1.07 x 105 Ci 5
l Total C -137 Release 6.4 x 10 Ci s
Fractional Release 6.4 x 105 Ci x 100 = 677.
9.5 x 105 Ci Sumo Cencentration 3.4 x 102 Jtci/gm
'; J l 1"J
.1
(.
i -
e
_w I
~
Ed
. c.
C -134 s
4 8
2.6 x 10 Ci RCS 82 AC1/gm x 3.2 x 10 gm
=
5 82 9
1 x 10 Ci RB Sump Ci/gm x 1.25 x 10 ge
=
Plateout 2.5 x 10 Ci 5
Total Cs-134 Release.
1.5 x 10 Ci Fractional Release (7.)
5
- 1. 5 x 10 Ci
-3. 5 x 105 Ci St=9 Concentration 82 uCi/gm II 3est Estimate Asstres 40,000 of RCS water at RCS activity level was in the RB Sump diluted with a total of 350,000 gallons.
a.
I-131 6
4.5 x 10 Ci
=
RCS 8
2 x 10 Ci RB Su=p 1.4 x 10* x 1.4 x 10 gm
=
1.3 x 10 Ci Platecut
=
6 Total 1-131 Release 7.8 x 10 Ci Fractional Release (7.)
6 7.8 x 10 Ci 100 13.77.
=
x 5.7 x 107 Ci Su=o Conc entration 3
1.6 x 10 pCi/gm b.
C,.-137 5
1.09 x 10 Ci
=
RCS 0
2 5.1 x 10 Ci RB Sump 3.4 x 10 Ci/gm x 1.4 x 10 gm
=
0 3.2 x 10 Ci
=
Plateout Total Cs-137 Released 1.92 x 105 Ci Fractional Release (7.)
5 1.92 x 10 Ci 100
- 207,
=
x 9.5 x 105 Ci
- o ;
c
,[U;l Sump Concentration 1 -- >
39 p,Ci/gm t
_ C,-134 c.
0 RCS 2.6 x 10 Ci 8
1.14 x 104 R3 Sump 82 p,Ci/gm x 1.4 x 10 gm Ci
=
Plateout 7.5 x 103 Ci.
Total C -134 Released 4.5 x 104 Ci 3
Fractional Release (%)
4 4.5 x 10 Ci 100 13%
x
=
3.5 x 105 Ci Sumo Concentration i
9 Ci/g=
IIT.
Lower Bound Assume Containment Surveys removed 907. of airborne I.
Assume C concentration on RB Sump on the same proportions s
to I as in the RCS.
a.
I-131 Centainment and concentratior af ter surveys 0.063 ACi/cc 8
RCS 1.4 x 10" :c 3. 217 x 10 gm 4.5 x 10 Ci
=
10 4
RB Susps 0.063gCi/c: x 9 x 5.7 x 10 cc 3.2 x 10 Ci
=
Plateout 0
6 Total I-131 Released 4.5 x 10 Ci Fractional Release (7.)
4.5 x 106 Ci x 100 8%
=
5.8 x 107 Ci Su=p Concentration 4
6 3.4 x 10 Ci x 10 pCi/gm = 27 uCi/gn 1.25 x 109 gm 7r1 m<,
LJ' i
)
4 e
- b.
C -137 s
5 RCS 1.09 x 10 Ci RB Sump negligable Plateout 0
5 Total C -137 1.09 x 10 Ci s
Fractional Release 1.09 x 105 Ci 100 11.57.
x
=
9.5 x 105 Ci Su=p concentration 0.5 pCi/gm c.
C -134 s
4 RCS 2.6 x 10 Ci RB S u=p negligible Plateout 0 Total Cs-137 2.6 x 10 Ci-Fractional Release (7.)
0 2.6 x 10 Ci x 100 7.57.
=
3.5 x 105 Ci
~
Suro Concentration 0.12 pCi/gm IV.
Noble Gas Release from Core Xe-133 10 7
Containment 675 pCi/cc x 5.7 x 10 cc = 3.8 x 10 Ci Contents Fractional Releasa (7.)
7 3.8 x 10 Ci 100 337.
=
8 1.16 x 10 Ci l
E&
(. J \\
uL-
g3 RELEASES OF ACTIVITY FROM Tile CORE (7.)
UPPER B0lmD 1 Baned on Based on Best Lower 2
Samples Xe-133 Estimate Bound i
I-131 447.
- 337, 147, 87.
I C -137 677.
- 337, 207.
127.
g I
1 l
C,-134
- 447, 337, 137.
87.
1.
Based on the ratio of the calculated release of the indicated compared to the inital core inventery.
IN3 2.
Based on the calculated release of Xc-133.
It is reasonable
((]
to assume that the release fraction of Cs and I are no greater than that for the noble gases.
f..~ l C
e 9
E e
g
I I
r REACTOR BUILDING SUllP ACTIVITY OVER TIME (BE5'r ESTIMATE)
( jtci/r,m) total ci t
l Day 48 Day 78 Day 180 (May 15)
(June 14)
(Sept. 23)
I-131 26 2
3.1 x 10-4 6
}
3.3 x 10 2.5 x 103 0.39 1
C -137 39 39 38 3
5.1 x 104 0
5.1 x 10 5x 104 Cs-134 7.5 6.7 4.5 3
9.5 x 103 8.4 x 10 5.8 x 103 1.
Assumes no further dilution of the RB Sump water.
N l.M b
e
s
=
ItEACTOR Hull. DING SUMP ACTIVITY G4CL/cc)
Total C1 I
UPPER BOl!NI)
[.
Based on Based on Best Lower i
Samples Xe-133 Estimate Bound
.N 0
0 3
((]
I-131 1.4 x 10 1.02 x 10 1.6 x 10 27 6
4 1.8 x 107 1.3 x 107 2 x 10 3.2 x 10
( -J i
r,_
C -137 2
s 3.4 x 102 1.7 x 10 39 0.5 4.3 x 105 2.1 x 105 5.1 x 10 775 C -134 82 61 9
0.12 s
0 1
x 10 7.6 x 10 1.14 x 104 184 1
I t
l l
l
.