ML20155H022
| ML20155H022 | |
| Person / Time | |
|---|---|
| Site: | 07001113 |
| Issue date: | 01/27/1986 |
| From: | Winslow T GENERAL ELECTRIC CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML20155H020 | List: |
| References | |
| FOIA-86-169 NUDOCS 8605120077 | |
| Download: ML20155H022 (3) | |
Text
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GENERALh ELECTRIC
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NUCLEAR FUEL MANUFACTURING DEPARTMENT GENERAL ELECTmC COPFANY
- P.O. Box 780
- WILMfNGTON. NORTH CAROttNA 28402 January 27, 1986 L. ;
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Dr. J. Nelson Grace Regional Administrator
- t' U. S. Nuclear Regulatory Commission, RII 101 Marietta Street, N.W. - Suite 2900 E
Atlanta, Georgia 30303 C3
Dear Dr. Grace:
cm
Reference:
NRC License SNM-1097, Docket 70-1113
Subject:
COURTESY NOTIFICATION CONFIRMATION On 1/22/86, General Electric Company Nuclear Fuel Manufacturing Department experienced an elevated stack discharge and a minor process upset which did not require formal reporting pursuant to federal regulations or license conditions.
However, as a matter of courtesy, on 1/23-24/86 the NRC Region II offices were notified.
The following confirms the information previcusly transmitted.
The process upset occurred in one of the conversion reactors which produces U O 3g at approximately 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> on 1/22/86.
The process shut down immediately and automatically.
A feed hose within the secondary containment was burned allowing material to escape from the primary containment into the secondary containment.
The situation was aggravated by a nitrogen purge line which remained on and caused the discharge of larger than normal amounts of material (primarily U 0 ) into the secondary containment.
3 8 The material in the secondary containment was mainly picked up in the normal vent system, processed through the scrubber and exhausted through the HEPA filter bank and the stack.
A slight amount of material was released to the controlled area and personnel were immediately placed on full face mask status.
The highest applicable air sample result during the upset was 2.5 times MPC, however, there was no worker over-exposure.
A ten hour stack sample indicated a concentration of 3700 x 10-12 pCi/cc (800 grams uranium) discharged.
The atmospheric conditions were Stability Class D with winds from SSW at 15 mph.
Dispersion calculatione for the centerline of the plume show a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 8605120077 860425 j.
GENERAL $ ELECTRIC Dr. J. Nelson Grace January 27, 1986 Page 2 average concentration of 1.1 x 10-12 uCi/cc at the controlled access area fence line (850 feet) and 0.2 7 x 10- 12 pCi/cc at the site boundary (3100 feet).
The NE ambient air sampler ( ~1200 feet northeast of the release and potentially on the frinae of the plume) showed an average concentration of 0.05 x 10-12 pCi/cc after only five hours decay.
The involved eouipment and similar equipment have been shut down and will not be operated until corrective action has been implemented.
Under the terms of our license, the incident was identified as a class II incident and is being investigated in accordance with our internal procedures.
The Manager, Regulatory Compliance, is heading the investigation team.
The larger than normal measuref discard from the stack aopears to be the result of eight HEPA filters (in a 32 filter bank) which were not properly clamped in place.
The reason for this has not been determined, however, our investigation will document this situation and the resulting corrective actions to prevent a reoccurrence.
Based on the information we have, there was no significant exposure to our employees nor to the general public.
There is no material control and accountability impact because the material was all contained or measured by approved MC&A discard methods.
The situation, therefore, does not require formal reporting either by regulations or our license.
Records of our investication will be retained and these will be made available to your inspectors as required'.
Sincerely, GENERAL ELECTRIC COMPANY
=
T. Preston Winslow, Manager Licensino & Nuclear Materials Management l
M/C J26
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