ML20054F349
| ML20054F349 | |
| Person / Time | |
|---|---|
| Site: | 07109152 |
| Issue date: | 05/20/1982 |
| From: | Marsh C CHEM-NUCLEAR SYSTEMS, INC. |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 20747, NUDOCS 8206160120 | |
| Download: ML20054F349 (5) | |
Text
_
gj-9/5V g CHEM-NUCLEAR SYF.s 2MS iNC.
pp 4 P.O. Box 1866ki/MNue, Washington 9800" * (206) 827-0711 Reb b.
May 20,1982 e
,j2 23 nl"- w 34)6-$$
m o S.p p
di
.2HS 4
g Ussy.
IE 28194, {5 m,?ss t-m
~
fir. Charles E. MacDonald, Chief 8
9D
% cY[g gy' mTD Transportation Certification Branch D
A
.gQ 3
Fuel Cycle & Material Safety Division 9
M4y p 71982.
11 U. S. Nuclear Regulatory Commission Z
~_~
Washington, D. C. 20555 i--
- u. s. ny,,,,,
V com-. %ron,
Reference:
Docket No. 71-9152 N"~
q, kaitsecun p
Dear llr. MacDonald:
y We are hereby notifying you that a possible typographical error has been noted in the 1-13CII Certificate of Compliance 9152, Rev. 0 issued on April 4,1982.
The item in question is listed on page 3, section 10(ii). We believe this sentence should read:
"Each package must be leak tested to insure a leak rate not greater 3
than 3.86 x 10-5 atm-cm /sec at STP prior to first use, after the third use and annually thereafter."
References to 3.86 x 10-5 (0.21 oz/yr.), as the leak rate, appear throughout our Safety Analysis Report.
Specific examples are attached to this letter.
We ask that you advise us, and your representative at Three-Mile Island, of the actual rate which must be used in leak testing the cask as referenced in the Certificate of Compliance.
Sincerely, CHEM-NUCLEAR SYSTEMS, INC.
%Y bh S
Chryl A. Marsh j
A Licensing Coordinator
^q; f' 020 7Y1 CAM:s1j e
I
-rr rvO;M' A/;-
F i.[ i_ /.LNF fl a
s s
,- O /
/
8206160120 820520
([// tAledtu;t M7 C
PDR l
/
Revision 2 December,1981 Where:
[C = 4.1534 x 10-7 t
1H = 0.21 oz/yr Tg = 288 K PT = (1 + 12/14.7) = 1.816 ATM.
3 = (4.1534 x 10-7) (0.21)(288)
L 3
2 (1.816 - 1.816 - 1.816 + 1 )
3 = 1.34 x 10-5 ATM - cc/sec.
(Standard L
0 conditions, air at 25 C and 1 ATM pressure).
2 l
l
\\
t 4
4-14 l
u w uu w ur7s December 1928 t,
3.1.2 Interior and exterior cask surfaces shall be clean and free of contaminants which could affect leak test sensitivity.
3.2 Tools. Materials and Equipment The following equipent is required for Halogen Gas Leak Testing:
(1) Leak Detector - General Electric Type H-25 "The Ferret Leak Detector" or equivalent equipment.
(2) Pressure Gauge - A gauge capable of indicating required pressure with a calibrated accuracy of 1.25% of gauge reading.
(3) Temperature recording equipnent capable of reading within i 20F.
(4) Halogen Gas Source (dichlorodifluoromethane, Freon R-12) shall be the halogen gas.
2 1
4.0 PF.:.:EDS.E 4.1 Leak Detector Preparation (1) Leak detector is to be calibrated and operated in accordance with reference 2.3 (2) Temperature measuring equipment shall be attached to cask l
with the temperature reading recorded.
t (3) Calibration of the leak detector shall be established at
.21 ounces / year for Freon R-12. (3.85 x 10-5 ATM - cc/sec) 4.2 Discussion of alicumble leak rates derived from containment section 4.0 of 3-13CII Safety Analysis Report.
l
[
i 8-4 l
Revtston 2 December 19E2 The following calculations are shwn for the detemination of cask charge pressure based on the artient tecperature at time of test.
NOTE: The Graph Figure 3. depicts the resultsJof I
these calculations and will be used for all normal conditions at time of leak test.
2 hK 3
g -P +1 - (4.1534 x 30-7)
=0 Pt -P t
Ls Where:
Tg = Casn Temperature, OK Pt = Re:;uired Charge Pressure, ATM L3 = Permissatle Standard Leak Rate (Dry air at 250C ar.d ATM) 2 1.34 x 10-5 ATM cc/sec In = De te:ter Ser.sitivity = 0.21 oz/yr(3.85 x 10-5 A7M - cc/se: )
4.3 Leak Testing (1) Che:6 all surfaces with detector to detemine cask is free of residual halides which could affect test.
(2) Clean any surfaces found to have halide levels above ba:L-ground indications.
(3) Examine flat gasket 0-ring and statoseals for damage or deterioration and replace as applicable.
(4)
Inste11 lid in cask in accordance with reference 2.5.
(5) Record temperature measurement of cask.
B-5
.