ML17150A232
| ML17150A232 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 04/13/1983 |
| From: | Mueller D COMSIP, INC. |
| To: | Deyoung R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| Shared Package | |
| ML17150A234 | List: |
| References | |
| REF-PT21-83 160470, NUDOCS 8312200259 | |
| Download: ML17150A232 (3) | |
Text
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~i ISIIPy lAcs instrument and control systems HCADOIIQITO%> ONO SH Hat La~ Whlule'AÃNOl014i'~ Telea i~N
'60470'pril'3, 1983
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Office of'nspection and Enforcement Nuclear Regulatory Comttii ss ion Mashing ton 0.'.
20658 Attention: 'Mr. Richard C. Young, Director
Subject:
10CFR21 Report 6ent1emen:
Thermodynamic calculations of the effect of iodine released in a maximum credible accident on the catalyst used in the Comsip models K-II I and K-IY containment gas monitoring systems have been done by a number of groups.
Since these calculations make a number of assumptions, the results do not correlate wel1; i'.e., while evaluation by Comsip showed the'atalyst life as satisfactory, Sargent and Lundy calculations indicated a life of, 2 days, Therefore, Gomsip initiated testing with iodine concentrations exceeding what could be expected in a large HNR.
0.02 mi llimeters of mercury vapo~ pressure, At this concentration the standard'ata1yst bed remains useful for 10 days.
A new configu~ation has been tested and shows no degradati on after 5 months, Since the 1 ife of the catalys t is an inverse linear function of the iodine concentration, a large PAR (with 10 times the containment volume of an equivalent output 8MR) would have a catalyst life of 100 days using the standard.catalyst bed.
Gomsip is manufacturing the new catalyst bed configuration which will be in all-K-III and K-IV systems shipped after April 1; 1983'dditiona1 catalyst beds are being manufactured'"
as replacements for the cata1yst beds in systems and in spare::.:;.
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I CUSTQMIJNS DIVISION aUU DIVISION S aflPIIIINOTRUMSNTS, INC, QKPHI SYSTCINS OIYlslaM 14IS K, UIMIioA'voDQ. SO% 1~
b501 JMltOI ROLd, HotNIOA, TX 7T040 5MO 84d HOI~
Uneven. NJ OTNO i P% Bag QOSI. Hnuata~ W~ii
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v Apr il'13, 1983 Hr - Richard C. Young,'Director
'ffice of Inspection and Enforcement Nuclear Reegulatory Commission Page 2
A form letter is being sent to each customer for either systems or spar e cells.
It is expected that a11 letters will be sent
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by 20 Nay 1983, A copy of the form letter
)s enclosed ei th a
1 )st of customers.
Me extend our appreciation to Nr. Uldis Potapovs of the NRC for his assistance in handling this matter.
S)ncerely, Corns)p Inc.,
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Systems Oivision r
0.'C, Nueller equality Assurance Nanager r
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