ML19332A399
| ML19332A399 | |
| Person / Time | |
|---|---|
| Site: | 07001100 |
| Issue date: | 07/10/1980 |
| From: | Lichtenberger ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY |
| To: | Cunningham R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 17000, NUDOCS 8009110706 | |
| Download: ML19332A399 (2) | |
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C-E Power Systems Tel. 203/688-1911 Combustion Engineenng. Inc.
Telex: 99297 1000 Prospect Hill Road
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Windsor. Connecticut 06095 4,,,, s.,,,.a N
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SNM License 1067 c.
July 10, 1980 0
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9 DOCKETED Cf U. S. Nuclear Regulatory Commission Washington, D. C.
20555 USilRC Attention: Mr. Richard E. Cunningham, Director Division of Fuel Cycle & Material Safety MAH. sECHON S
DOCKET CLEIU(
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Dear Mr. Cunningham:
Pursuant to Amendment No. 25 of License SNM-1067, Combustion Engi g, Inc.
hereby iubmits this letter to inform you that we have exceeded our quarterly reporting level of 18pCi of airborne particulates from the Windsor site during the second quarter of 1980. The total quantity discharaed durin the period March 30 through June 28 was 22.23pCi of low enriched (13.65% U2gs) 00.
2 The 18x i level was exceeded on June 24th when approximately 11.3pC1's of activity were released. This occurred after completion of an absolute filter change in the FA-4 ventilation system in which the new filters were not replaced in a tight sealing configuration. The FA-4 ventilation system was immediately shut down and an investigation was initiated to determine the cause of the release.
It was determined that the overall dimensions of the replacemcot absolute fil-ters were slightly smaller than filters purchased in the past. This resulted in a small amount of air leakage around the filters, causing the 11.3pCi release on June 24th. To assure against any recurrence of this type, the following cor-rective actions have been taken:
- 1) A procedure which specifies the exact dimensions (and allowable tolerances) for replacement absolute filters for all four venti-l 1ation systems has been written and approved by the Engineering and Health Physics groups. This procedure will be followed during all subsequent absolute filter changes.
It also includes a require-l ment to inspect, for adequate sealing in the filter box, all absolute filters which are replaced or moved.
- 2) Upon completion of an absolute filter change in any of the ventil-ation systems, an air sample will be obtained after 30 minutes, 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, and 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of operating time. These samples will be analyzed immediately to identify any possible leakage through the filters so that the system can be shut down before a significant particulate release occurs.
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de;.t The above corrective actions include multiple safeguards to eliminate any future recurrences of this type.
Very truly yours,.
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H. V. L chtenberger Vice President-Nuclear Fuel Nuclear Power Systems-Manufacturing HVL/GAJ/ssb cc:
U. S. Nuclear Regulatory Commission Region I Attn: Mr. George H. Smith, Chief Fuel Facility.& Material Safety Branch 631 Park Avenue King of Prussia, PA 19406 U. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D. C.
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