ML19329E311
| ML19329E311 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 01/17/1978 |
| From: | Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-77-07, IEB-77-7, NUDOCS 8006120619 | |
| Download: ML19329E311 (2) | |
Text
,m
?p' *O Power CODSum8IS L
T CO@M S a"*" " "* **"
Vice 14essdent oeneral of fices: 1945 West Perne10 Road, Jack,on, Michagen 49201
- Aree Code 517 788-0453 January 17, 1978 Ifove-5-78 Mr J G Keppler, Regional Director Nuclear Regulatory Commission Region III 799 Roosevelt Rr'sd Glen Ellyn, IL 60137
)
MIDLAN1' PROJECT D0r'.T NO 50-329, 50-330 i
R BULLETIN 77-07 FILE: 0505 2 SERIAL: 4703 II: Bulletin 77-07 requested that Consumers Power Company conduct an investigation into the use of containment electrical penetrations used in safety related syste=s and respond to Items 1.0 through 3 2 of the above bulletin. Our response keyed to your item nu=bers follows:
1.0 We plan to use containment electrical penetrations that are similar to the General Electric Series 100, in that they depend upon a glass-filled epoxy sealant and a dry nitrogen pressure environ =ent to ensure that the electrical and pressure characteristics are maintained to preserve functional capability as required by the plant's safety analysis report.
The manufacturer of the penetrations is Bunker Ramo Corporation, Amphenol SAhG Division, Chatsvorth, California. The Amphenol model number for the type of assemblies that will be supplied is 50013093.
1.1 Not applicable, see 1.0 above.
1.2 The transition connector pins or feed-through conductors that are embedded in the epoxy material are uninsulated. These feed-throughs are specially crimped to insulated conductors which are in turn terminated at connectors or terminal blockr provided for external cable connection. Additional pot-ting of epoxy mat crial is provided around the crimped connections primarily to provide mechanical stress relief for the crimp connection.
2.0 The manufacturer vill pressurize each penetration assembly with dry nitrogen prior to ship =ent to a maximum pressure of 100 psig. A positive pressure vill be maintained during shipping, storage, and installation.
30 There is a need, as determined by the vendor, to maintain a positive pressure in the penetration sealing cavity during normal operation to assure function-ability during a LOCA.
A0 2 EN 191978 80 U6 120 $/f (69 q
,t 2
Scrial 4703 31 The penetration assemblies will be qualified through prototype testing which vill simulate IDCA environmental conditions. The testing program vill comply with IEEE Std 317-1972/R01.63 dated 10/73 and IEEE Std 323-197h/R0 1.89 dated 11/7k. The environmental test plan is described in the Midland PJAR, Table 3.11 k, Qualification Test 10.
A quality assurance program, meeting the requirements of Appendix B to 10 CFR Part 50, is implemented in the design, construction and testin6 of the penetration assemblies.
3.2 The vendor's quality assurance and qualification test programs, implemented.
to verify the penetration assemblies' ability to perform their design function under LOCA conditions, adequately satisfy applicable NRC regulations.
("-}, L,.
~ m'),. )~[' 3 - w -
,y
~
SIIH/jbg CC: Director, NRC Office of Inspection & Enforcement Director of Huclear Reactor Regulation O
_-