ML20033D962
| ML20033D962 | |
| Person / Time | |
|---|---|
| Site: | 07105980 |
| Issue date: | 09/13/1988 |
| From: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20033D963 | List:
|
| References | |
| FOIA-90-29 NUDOCS 8809190302 | |
| Download: ML20033D962 (2) | |
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CEMacDonald RChappell EPEaston NMSS r/f 4
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PVacca MEMORANDUM FOR: The Files n
s FROM:
Charles E. MacDonald, Chief E
Transportation Branch d
Division of Safeguards and 1
Transportation, NMSS
SUBJECT:
SHIPMENT OF RADIATION STERILIZERS, INC. (RSI) SUSPECTED 1
LEAKING Cs-137 SOURCE CAPSULES IN MODEL NO. GE-600 CASK
REFERENCES:
(1) Memo, MacDonald to files, dated September 7, 1988 s.
(2) Memo, Rawl to Odegaarden, dated September 2, 1988 tiK The staff agreed to the shipment of a potentially leaking Cs-137 capsule from N
RSI to Oak Ridge National Laboratory (ORNL) on August 17,1988(Reference 1)
"l in the Model No. GE-600 cask.
The procedures reviewed by the staff concluded that only 1 gram of water would
.g remain in the encapsulation canister.
Upon opening the canister in the Hot 2;
Cells at ORNL on August 18, 1988, about 100 grams of water was found in the a;
canister. As a result of this failure of the procedures further shipments of suspected leaking Cs-137 source capsules were suspended until revised procedures could be developed and tested.
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The proposed procedures in Reference 2 assure dryness by blowing the water out 5
of the canister with nitrogen gas through a dip leg in the canister. This P
would be followed by a purge with dry nitrcgen gas and the sealing of the 4
inlet and outlet lines. An added T-fitting in the inlet line on the canister will then be opened and a vacuum will be introduced into the canister.
Pressure in the canister will be reduced to below the saturated vapor pressure of water T
at the prevailing pool temperature and be held for 30 minutes. The vacuum will 3
then be broken by the introduction of helium into the capsule followed by reducing N
the pressure again in the capsule. This will be repeated twice.
Then helium at O
10 psig will be introduced into the capsule and a bubble check preformed on all e
seals in the pool.
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4R The staff believes the revised procedures with vacuum drying of the capsules 3
for the proposed content meets the requirement of 10 CFP. Part 71.
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Charles E. MacDonald, Chief E
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DISTRIBUTION:
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71 5980 CEMacDonald CRChappell L
RH0degaarden(2) NMSS r/f gy EPEaston PVacca W
MEMORANDUM FOR: The Files SGTB r/f a.
Charles E. MacDonald, Chief j.
FROM:
Transportation Branch d,
Division of Safegtiards and n
Transportation. HMSS t
SHIPMENT OF RADIATING STERILIZERS, INC. (RSI) SUSPECTED w.f
SUBJECT:
LEAK 1HG Cs-137 SOURCE CAPSULES IN MODEL NO. GE-600 CASK 0,..
i Note dated July 7,1988 (Heiskeli to MacDonald))
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REFERENCES:
13, 1988 (Heiskell to MacDonald Note dated July Note dated August 4, 1988 (Heiskell to MacDonald j
50 The NRC staff has reviewed the informaticn provided by the above refprences a
concerning the. shipment of possible leaking C.137 capsules from RSI, Decatur,
!E '
The sources will be contained
$j Georgia to ORNL in the Model No. GE.600 cask. individually in an encapsu f
9' 5.(b)(1) of Certificate of Compliance No. 5980, 4
Pressure drop tests will be performed to ensure a leak-tight seal of 1x10 a
t The valves are protected from impact conditions of transport,
@j atm.cc/sec.
A detailed structural analysis was not submitted, but the design appearsA sma i
reasonable and sufficient.
N canister following the drying procedure.
y The staff believes the proposed contents meets the requirements of 10 CFR
+^j Part 71.
Oristimi sta g n
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h-Charles E. MacDonald, Chief
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Transportation Branch 1
Division of Safeguards and Transportation, HMSS 3
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DATE:09/o7/88
- 09/o7 /88:09/'~/ /88 :09/1/88 3
0FFICIAL RECORD COPY O%
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