ML20006B691
| ML20006B691 | |
| Person / Time | |
|---|---|
| Site: | 07109160 |
| Issue date: | 01/24/1990 |
| From: | Baker B AMERSHAM CORP. |
| To: | Withee C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 9002050261 | |
| Download: ML20006B691 (5) | |
Text
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f 7/Mlc,0 7%mersham Corpora 9on dA%80IGW 2636 South Clearbrook Dnve -
3 Arkngton Heights, hlinois 60005-4692 J
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fanuary 24, 1990-Amersham Nuclear < Regulatory Commission 4
Division of Safeguards and Transportation, NHSS Washington, DC 20555
'~' Attn:- Carl Withee Transportation Branch Re:: Tvoe B Certificate No. 9160 Model Numbers 20-VS and 40-VS t
Dear Mr. Withee,
'N Thank you for the-information you had sent me.
I have revised the Operating Procedures, Acceptance Tests and Maintenance Programs to reflect changes in the regulations, and the fact that although Amersham Corporation acquired Gulf Nuclear, we have never manufactured these containers and do not. intend to do so, i
I hope that.these revised procedures and the information I provided in my
. letter of September 22,1989. addressed to Charles E..MacDonald will enable you.
to renew Certificate No. 9160.
- Please do notLhesitate-to contact me should you require additional information-
- or have any. questions on that which I.have submitted.
I may be reached by pho'ne at (708) 593-6300, extension 379.
-i Sincerely yours, l
3 aJbck l
' Bryan ~. Baker, Ph.D.
Manager, Environmental and Safety a
Regulatory Affairs 6
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3 OPERATING PROCEDURES, ACCEPTANCE TESTS AND MAINTENANCE PROGRAMS FOR MODEL NUMBERS 20-VS and 40-VS i
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- 4. OPERATING PROCEDURES
'4.1 Procedures for Source Chanaina The~ following is _the standard procedure for source changing:
(' l)
Connect source changer tube to nose of camera.
l (2)
. Connect crank out conduit to lock block.
(3)
Make sure. lock is in up position.
(4)
Turn crank handle clock-wise and crank out enough cable to make connection on pigtail (approximately 3 inches).
~(5)
Make connection between the disconnect and the connection on the i
pigtail.
(6)
Connect source changer tube to the changer, (7)
Clear the area of all personnel.
(8)
Place a survey meter close to camera, in the on position, so that the meter movement can be seen.
(9)
Standing as far away as possible from the camera, rotate the crank handle counter-clockwise rapidly. The survey meter should go from a low reading to a high roading and back to the low reading.
(10)
Lock the camera.
(11)
Disconnect changer te.be from camera and replace with safety plug.
.(12)
Disconnect crankout conduit and replace with dust cover.
(13)
Monitor package with survey meter to ensure that radiation levels do not exceed 200 mrem /hr on surface and 10 mrem /hr one meter from surface.
(14)
Attach serial number and identification tag to package.
4.2 Procedure f or Unloadina the Package When a package is received. -it must be checked for contamination and radiation level as required in 10 CFR 20.205.
If contamination or radiation levels are in excess of the specified limits, the required notification (per 10 CFR 20.205) will be made.
If the contamination or radiation levels are within the specified limits, the_following is the procedure to be followed for unloading the package.
(1)
Remove safety plug and attach changer tube to camera and changer.
(2)
Remove dust cover and connect drive cable to connector on pigtail.
-(3)
Connect drive cable conduit to camera.
(4)
Using appropriate key, unlock camera.
1 (5)
Place a survey meter, in the on position, so that the meter movement can be seen.
(6)
Standing as far away as possible from the camera, rotate the crank handle, clockwise rapidly.
The survey meter should go from a low reading to a high reading and back to a low reading.
(7)
Lock the changer.
(8)
Disconnect the changer tube from the changer.
(9)
Uncouple disconnect from the connector on the pigtail.
(10)
The radioactive material is now ready for removable to storage.
(11)
Remove the changer tube from the camera.
(12)
Check the changer tube and camera for contamination.
The level of contamination must not exceed that given in 49 CFR.173.443(a).
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- 5. ACCEPTANCE TESTS AND MAINTENANCE PROGRAMS I-S.1 AcceDtance Tests All 20-VS and 40-VS containers were nanufactured and used in accordance with Gulf Nuclear, Inc.'s Quality Assurance Program. Approval number 0210, Revision 2, Expiration Date, July 31, 1988.
5.1.1 Visual Inspection Each package was visually examined to insure proper assembly and that the package was properly marked.
4 5.1.2 Structural and Pressure Tests Prototypes of_the 20-VS and 40-VS were. tested'to a minimum of.210 pounds external pressure.
5.1.3 Leak Tests All-radioactive sources used'in' the Model 20-VS and 40-VS cameras were subject t
to leak tests as prescribed for special form materials'(49 CFR 173.469) and IAEA Safety Series No. 6 1973 Revised Edition.
Failure of any of these tests prevented usef of the source capsule.
5.1.4 Component Tests The lock-block: assembly was tested for locking the radioactive materials-securely inside the package. The shielding materials were checked for shielding integrity during manufacture and upon completion.
The S-tube was checked for obstructions during preliminary construction and upon completion.
1,1.5 Tests for Shieldina Intearity Shielding tests were conducted as component tests and during manufacture.
Surface readings and at one meter were conducted using a source designed for L
the camera. Surface readings did not exceed 200 mrem /hr and one meter reading
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did not exceed 10 mrem /hr.
Failure of this test, prevented use of-the package.
5.1.6 Thermal Acceptance Test
-Not applicable.
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5.2 MAINTENANCE PROGRAM 5.2.1 Structural and Pressure Tests Not applicable, i
5.2.2 Leak Tests Described in section 5.1.3.
The radioactive source capsule was leak tested at manufacture and at six month intervals.
5.2.3 Subsystem Maintenance The lock assembly was tested as described in section 5.1.4 prior to the use of the package.
The S-tube is checked for ease of movement every time the source is cranked in and out.
5.2.4 Values. Rupture Disks and Gaskets Not applicable.
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. 5.2.5 Shieldina Before the shipping of a package and when replacing a spent source, the radiation levels on the surface and at one meter are to be checked.
.I f surface readings exceed 200 mrem /hr or one meter reading exceeds 10 mrem /hr, the' package is to be rejected and taken out of use.
5.2.6 Thermal Not applicable.
5.2.7 Miscellaneous 1
Not applicable.
5.3 Initial Acceptance Upon receiving the depleted uranium camera castings, they were individually checked with a 220 Ci. source.
The castings were loaded and surface readings taken. Castings with readings which fell into 60 to 120 mR/hr range were marked-40VS.and are loaded into the housing and a stainless steel label marked 40VS was placed on the camera.
The castings which read 120 to 180 mR/hr range were considered 20VS and appropriately labeled.
The castings which read over 180 mR/hr were rejected and sent back to the manufacturer. Each individual camera,- af ter construction, was reloaded and checked to meet the above requirements.
5-2 January 24, 1990