ML19309D524
| ML19309D524 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 03/13/1980 |
| From: | Ross D JERSEY CENTRAL POWER & LIGHT CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-03, IEB-80-3, NUDOCS 8004100424 | |
| Download: ML19309D524 (2) | |
Text
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a' fi Jersey Central Power & Light Company 7
.m.,
(4" (
Madison Avenue at Punch Bowt Road kI Momstown, New Jersey 07960 (201)455-82 %
March 13, 1980 Mr. Boyce H. Grier, Director Office of Inspection and Enforcement United States Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Mr. Grier:
SUBJECT:
Oyster Creek Nuclear Generating Station Docket No. 50-219 IE Bulletin No. 80-03 The purpose of this letter is to respond to IE Bulletin No. 80-03 which directs the licensees of power reactor facilities to determine if charcoal filters in use or proposed for use have the potential for a loss of charcoal incidental to handling, storage or use.
The use of charcoal adsorber cells at Oyster Creek is limited to each of two (2) Standby Gas Treatment Systems (SCTS) which serve to exhaust the reactor building atmosphere during conditions which require secondary containment isolation.
Each SGTS makes use of a filter train that includes five (5) charcoal adsorber cells that function as radio-nuclide filters and thus minimize the release of radioactive materials to the environ-ment during accident conditions.
A visual inspection of a representative sample of charcoal adsorber cells that are installed or available as stock spares has been performed in accordance with the recommended methods specified in Section 5 of ANSI N510-1975, Testing of Nuclear Air Cleaning Systems.
The units inspected were manu-factured by Mine Safety Appliances (MSA), Evans City, Pennsylvania.
They are identified as follows:
MODEL NO.
SERIAL NO.
LOCATION 1743-1002 G906 Stock G907 G908 G909 G910 G911 G912 G913 G914 G915 8 0 0 410 OtMt.f.
Jersey Central Power & Light Company is a Member of the General Public Utites System.
e-
6 IE Bulletin No. 80-03 Page 2 March 13, 1980 MODEL NO.
SERIAL NO.
LOCATION B-SK1743-2439 76-100 SGTS #1 76-101 76-102 76-103 76-105 A visual inspection was performed on the charcoal adsorbers listed above utilizing background and supplemental light in excess of 450 foot-candles on the surface to be inspected.
The conditions of the units were observed to be as follows:
1.
The perforated screen is attached to the cell casing using spot welds at approximately 1 1/2" spacing.
There was no evidence of screen sagging or bowing which could result in loss of charcoal and/or channeling.
2.
rhere was no indication of filter housing or mounting frame deformation.
3 Stock units wrapped in plastic protective covering did show some fine char-coal dust.
As a result of discussions with a vendor representative we con %
clude this to be a result of the manufacturing process (residual) cnd not an indication of structural inadequacies.
4.
None of the units inspected showed any indication of significant loss of filter inventory when subject to an attempt to pass' light thru the filter body.
5.
A sealant is provided around the border of the unit between frame members to enhance container integrity.
6.
Gasket material provided to ensure proper seal between cell and mounting frame was observed to be functional without any indication of degradation.
Based on the aforementioned observations, we conclude that the charcoal adsorber cells presently utilized at Oyster Creek are acceptable and provide no indication of structural deficiencies which could affect fil ter performance.
Very truly yours,
- I Donald A. Ross, Manager Generating Stations-Nuclear ck cc:
Director Division of Fuel Facility and Materials Safety inspection Office of Inspection and Enforcement United States Nuclear Ragulatory Commission Washington, DC 20555