ML20083A342
| ML20083A342 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 04/13/1983 |
| From: | Mueller D COMSIP, INC. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML17150A234 | List: |
| References | |
| REF-PT21-83 160470, NUDOCS 8312200263 | |
| Download: ML20083A342 (3) | |
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HEADQUARTER $ ' 3030 Red Het Lane. Whittler. CA 90001 Q141543 0011 Yelsaa 87 4Fse instrument and control systems April.13, 1983 4
Region IV-Nuclear Regulatory Commission
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Suite 1000 611 Ryan Plaza Drive h
Arlington, Texas 76011 Attention:
Mr. John T. Collins, Regional Administrator
Subject:
10CFR21 Report Gentlemen:
Thermodynamic calculations of the effect of iodine released in a maximum credible accident on the catalyst used in the Comsip models K-III.and K-IV containment gas monitoring systems have been done by a number of groups.
Since these calculations make a number uf assumptions, the results do not correlate well:
i'e., while evaluation by Comstp showed the catalyst life as satisfactory. Sargent and Lundy calculations indicated a life of 2 days.
Therefore, Comsip initiated testing with iodine concentrations exceeding what could be expe 0.02 millimeters of mercury vapor pressure.cted in a large BWR:
At this concentration the standard catalyst bed r9 mains useful for 10 days.
degradation aftte 5 months.A new configuration has been tested and shows no Since the life of the catalyst is' PWR (with 10 times the containmant volume of an equivale s.
output BWR) would have a catalyst life of 100 days using the' Nz"
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N,8 T ' Comsip'is' manufacturing the new catalyst bed configuration which will be in all K-I!! and K-IV systems shipped after-no 58 April li 1983.'
Additional catalyst' beds are being manufactured L
as replacements for the catalyst beds in systems and in spare
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N CUSTOMLINE OlV1840N OULF DIVil!ON 4 DELPHI IN57 BUM 2NTS, INC.
DELPHI SYSTEMS DIVISION
- E 1418 E. Linden Ave. P.O. Dos 142 840 Jameel Road. Houston. TX 77040 3030 Red Het Lane O E 486 1272 lea: 134496 '
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' TNo 79 1
- 1) E.9 ea: 674708
160470 April 13, 1983 Mr. John T. Collins Regional Director, Reginn IV Nuclear Regulatory Commission Page 2 A form letter is being sent to each customer for either systems or spare cells.
It is expected that all letters will be sent by 20 May 1983.
A copy of the form letter is enclosed with a list of customers.
We extend our appreciation to Mr. Uldis Potapovs of the NRC for his assistance in handling this matter.
Sincerely, i
,8 Comsip Inc.,
Delphi Systems Division N
D.C. Mueller Quality Assuranc'e Manager O
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18oevo instrument and control systems te6A00UARTERS
- 30 3 fled Mel Lane. Whittler.CA 9000l(214 4024g21 Telen th4784 I
Date Utility Owner Street Address City Address Attention:
Name
Subject:
10CFR21 Notification Gentlemen:
Cciculations have been made by several groups as to the effect on the catalyst used in the analyzer cell of the Comsip models K-III and K-IV Post-LOCA Containment Gas Monitoring Systems by fission-fragment iodine which may be present in the containment atmosphere after LOCA with core meltdown.
Because these calculations are dependent on several assumptions, the results have been inconsistant and Comsip has therefore initiated testing.to gather empirical data, Based on the most recent calculations provi.ded by a leading A & E f i rm, it is now assumed that an iodine concentration could reach 0.02 millimeters of mercury partial pressure under wor,st case con-ditions.
Using this figure, Comsip is in the process.of testing 2 catalyst bed configurations:
The standard configuration which is in all systems and spare analyzer cells shipped prior to April 1, 1983; and a new configuration which significantly increases the path length and catalyst volume with the same outside dimensions as the original.
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Resultf of these tests indicate thafwhile" the standard con-9-
.h'.g figu' ration;,. catalyst., beds may give satisf actory performance in ll' standard catalyst beds
/(. cost plantsy Comsip feels that a.I"should be1 replaced.using' catalyst beds of the new con
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j 'l chich have shown no. degradation af ter. 5 months of continuous"
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- k CUSTOMLINE DIVISION OULF olvist0N & DELPHI INSTRUMENTS. INC.
GELPHI SYSTEMS DIVl810N CP 1418 L Linden Ave, P.O. Boa 152 0001 Jameel Road. Houston.TX 77040 3030 Red Hat Lano M*?:'#'.3,..
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Date Name Utility Owner Page 2 16Q{yQ l
Comsip will sell to you modification kits consisting of (1) a modified c'atalyst bed assembly, and (2) installation procedures at our actuai cost of $
per kit.
We recommend that you purchase from Comsip one 6RidTfication kit per analyzer cell unit (including spares) in order that this recommended modification ~will be performed properly.
This modification equipment will be governed by a one year warranty from the date of purchase u.nder the same terms, conditions, and limitations as the original warranty on the analyttr cell units included in your system.
To purchase one or mure of these modification kits, complete and include with your order the enclosed Order Data Sheet form.
We anticipate that these kits will be available within 8 weeks after receipt of your order.
Comsip is pleased to assist you in this modification process so as to bring your syst'em up the highest state of the art.
Sincerely, f
l Comsip Inc.,
Delphi Systems Division D.C. Mueller Quality Assurance Manager
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ORDER DATA SHEET MODIFICATION KITS FOR COMSIP MODELS K-III and K-IV MONITORING SYSTEMS PURCHASER: __
I ADDRESS:
1 SHIPPING ADDRESS:
(if different)
No. of units purchased Date of Serial Number of (including spares)
Purchase
_ analyzer cell 4
Please send modification kits as described and under the terms stated in your letter dated
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