ML19326D382
| ML19326D382 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 12/23/1975 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 8006110392 | |
| Download: ML19326D382 (4) | |
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DISTRIBUTION December 23, 1975 NRC PDR ACRS (16)
50-329/330 smc ket File 3 PF i
LIG 2-3 RDG bec: JRBuchanan, ORNL VAMoore TBAbenathy, DTIE RH&ineaan Consumers Power Company hMcDonald ATIN: Mr. S. H. Howell LWR ICs Vice President ELD 212 West Michigan Avenue IE(3)
Jackson, Michigan 49201 ShhcKay EGoulborune Gentlemen:
TR BC;s Tne enclosed cocuents and requests for information are in response to your letter of July 21, 1975, regarding the implementation of Regulatory Guides at your Midland Plant. These guides deal with electrical engineerug.
As indicated in our letter of October 15, 1975, your response to this request for information was scheduled for January 13, 1976. Please infom us within seven (7) days after receipt of this letter of your confimation of this date or the date you will be able to meet.
i c'. ease contact us if you have any questions regarding the infomation requested.
4 Sincerely,
)
i h
I A. Schwencer, Chief i
Light Water Reactors Branch 2-3 Division of Reactor Licensing
Enclosure:
.y Request for Additional
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i Form AE318 (Rev. 9 53) AECM 0240 A u. s. sovannaisumv ensmiino orrics: te74.sse.see 4 ygyd. <._ h.
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. cc: floward J. Vogel, Esquire 1:nittle and Vogel 814 Flour Exchange Building 310 Fourth Avenue South Minneapolis, Minr., ;ota 55415 Myron M. Cherre, Esqu. ;c Jenner and Block 1 IDI Plaza Chicago, Illinois 60611 Harold F.Reis, Esquire 1.owenstein, Sc'.nm, Reis f; Axelrad 1025 Connecticut Avenue, N. W.
Washington, D. C.
20035 IIonorable William H. Ward Assistant Atterney General Topel.3, Ka.tsas 66601 Irving Like, Esquire Reilly3 Like And Schneider 200 tiest Main Street Babylen, New York 11702 Ja:nes A. Kendall, Esquire 135 N. Saginaw Road Midland, Michigan JS640 m
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MIDL!d:D U".ITS i A':D 2 IIIPLESST.i!IO' OF RFCULATORY CUIDES 221.0 ELECTRICAL. 1 :nC T.1 ' U O:: ? ':D CD':' 'OL SYS7 L:!S 221.1 Provide a lict of thc P.e;;ulator;. Guides whic'1 are fully implcu.ented in your cys tar desiv.c.
221.2 "ihe staff has revic..cd the excep: ion to position C.1 of Regulatory Guide 1.63.
A detailed dencript s.on of the plant design criteria to be iur lenented uhich is to satinfy General Design Criteria 50 (in lieu of Regulator:-
Guide 1.63) un preventTJ to MEC during the Mcze:..ber 13, 1975 tecting.
Provide de: ailed descri. tion of thg e criteria for staff revicu.
A.
i This renrou n
,h u'd. duo. '. ires c the folix!u; requirements ubich
!;nC un h.tt.nd:
includ;? in the criteria.
1.
The cont.iinm nt is not brachnJ. due to any electric.1 fault in a citeuit oc circuirn that *o through a penet r ' tion.
Thit incMdas an electrical fault in the penetrati"n ar.sembly or directly out: h..:.
2.
Assurance that the design critc ria rc<p'J a crents of the devices or Le thod.' included in the dcuinn t.hich protect the penetrntio-. against failure due to c.ny e]cctrical fault s are of a nigh quality and perfore these functions uith a high degree of confidence.
3.
Assuranec that au clectrical fault occurring in any portion of a circuit pasning throu;,h a penetration vill be cleared in a manner that protects the penetration as required in (1) above, prevents loss of power to redundant safety loads, prevents further equipacut damage and raintains the validity of the bases and assumptions used in the Accident Analysis.
B.
It is stated that overload protection is not provided for lou energy and instrumentation circuits then analysis denonstrates that a sustained raxinun overload ennnot cause ccchanical failure of the penetration.
Provide a description uhich identifies the analysis nathods to be used for these circuits, ln addition, provide a description of the types of overlead protection (circuit breahers, fuses, etc.) to be utilized in the plant design for the renainder of the circuits which pasc through penetrations.
C.
Indicate full confornance with the remainder of Regulatory Guide 1.63 cr identify and justify cach exception.
.h
221-2 221.3 Your response co Rer;ulatory Guide 1.73 states that the BOP valves have been type tested to Draft 13 of IEEE Std 382-1972.
Define and justify the bases for using this version of the sta dard vs the corrected version dated April 10, 1973.
Define and describe any differences between the two versionc.
If the Draft 13 version type tests are less conservative uinn th; corrected version dated April 10,1M3, juctiff its acceptabilit; for use in conjunction with Regulatory Guide 1.73.
221.4 Due to the dcarce and nunber or arcas of exception you have to Regulatory Guide 1.73,
.e require additional intor: ttion to complete our revic;.
/.s part of your respcase the follo: ting inforr.atien should be provided:
1.
11asic criteria included in the plant decir;n, 2.
Shetches and dr nrings that define the areas of your decign wherc c>:cc ptions e::is t, 3.
A sup; sorting discuanian that explicitly defines these arcas and de;;ree of conforce.uce, 4.
In ca se of egoir :ent in fvErication or fabricated, photographs are neceptabic jn lieu of -
tch.'s an j d re.* in:,r. c::d 5.
.1u a t :i f. e:<c ep t in - - to th, rc cc "rnd:: < an o f t-he 'cnolatory Guide.
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