ML20129J513
| ML20129J513 | |
| Person / Time | |
|---|---|
| Issue date: | 09/17/1996 |
| From: | Russell W NRC (Affiliation Not Assigned) |
| To: | Morris C AFFILIATION NOT ASSIGNED |
| References | |
| NUDOCS 9611060304 | |
| Download: ML20129J513 (5) | |
Text
. .
p ue% W 0~ $ [SC3
-< o UNITED STATES 5
- NUCLEAR REGULATORY COMMISSION g***** WASHINGTON, D.C. 20555-0001 September 17, 1996 Mrs. Carol Morris 6516 Roy Shafer Road Middletown, Maryland 21769
Dear Mrs. Morris:
In your husband's March 21, 1996, letter, he requested that the operating licenses of all nuclear power plants without residual voltage transfer capabilities be suspended until such time as their electrical distribution systems (EDSs) and associated relaying have been shown to be capable of transferring from the normal offsite power source to a capable preferred i
offsite power source after the high-voltage breakers have isolated the normal source and before the EDS is transferred to the emergency diesel generators (EDGs). He also requested that where the switchyard design makes it possible, it should be shown that the EDS is capable of being transferred from the preferred offsite power source to the normal offsite power source before the EDS is transferred to the EDGs.
l Your husband thereafter submitted an addendum of May 8,1996, to his leti..r of March 21, in which he again requested action with regard to all nuclear power !
l plant licensees. In accordance with NRC policy, we have completed our !
evaluation of the concerns set forth in his correspondences, and I am informing you of our conclusions.
NRC-licensed nuclear power plants are not required to have the noted residual !
voltage transfer capabilities. Such capabilities are not necessary to provide reasonable assurance of adequate protection of the public health and safety.
Plants licensed without these added transfer capabilities meet the requirements of 10 CFR Part 50, Appendix A, General Design Criterion 17 (GDC-17), " Electric Power Systems." The NRC's existing and longstanding standard for meeting the requirements of GDC-17 is that nuclear plants must have one immediate and one delayed access electrical power circuit from the offsite transmission network to the onsite emergency power distribution system. The I
NRC does not require nuclear plant electrical power system designs to possess the transfer capabilities that your husband believed are necessary. The l information presented in your husband's letters of March 21 and May 8, 1996, does not lead the NRC to conclude that its current interpretation of GDC-17
- requirements is incorrect or otherwise in need of revision. q l
opd. j, 00]
pfL l-2
, N M J A w +. !s 060093
>( .fb {f -SfOb u- '
0 WM
~
C611060304 960917 PDR ORG NRRA PDR a
l i
Mrs. Carol Morris l I appreciate your husband's willingness to bring his concerns to our attention and I assure you they were given a complete and fair evaluation.
Sincerely, i OriginaT EignoE Bri EffffN h. ss , Director Office of Nuclear Reactor Regulation l
DISTRIBUTION:
File Center /NUDOCS (w/ incoming), T-5C3 PUBLIC (w/ incoming), T-5C3 j ED0 Mail Room (GT96455 w/ incoming), 0-17G21 EDO Reading, 0-17G21 J. Milhoan, 0-17G21 H. Thompson, 0-17G21 J. B1aha, 0-17G21 J. Lieberman, OE, 0-7H5 F. Miraglia, 0-12G18 A. Thadani, 0-12G18 .
R. Zimmerman, 0-12G18 !
B. Grimes, 0-11H21 OPA, 0-2G5 0CA, 0-17A3 L. Soffer, 0-17G21 D. Morrison, T-10F12 K. Cyr, 0-15B18 i NRR Mail Room (GT 96455 w/ incoming), 0-12G18 ,
l C. Thomas, 0-13E16 I
! G. Lainas, 0-7D24 l S. Bozin, 0-7024 (GT96455) l F. Burrows, 0-7E4
! D. Thatcher, 0-7E4 l
l Tech Editor (BCalure) Comments Incorporated 8/5/96 l DISK / DOCUMENT NAME: G:\ SHARED \PETN03.REV
- SEE PREVIOUS CONCURRENCES l fo recoive a copy of this document, Indicate in the box: "C" = copy w/o attachment, "A M opy w/ attachment, "N" = No copy BC:EELB:DE OGC /"W2 ADTkidl[ dt D: NRR, ,ry/
l OFC A D:DE A NAME JACalvo BWSheron MRafky # ACThhni M WTRuN1b DATE OM 08/08/96* 9 /20/96 9 / // /96 d f //7/96 OFFICIAL RECORD COPY j '
^
pf<
gl2off G kb yf ,
1
~
k l
s l s Mrs. Charles Morris l the NRR formal generic issue process. He did not do so to the extent l necessary to cause the NRC to reevaluate its interpretation of GDC-17 l
I recognize that our conclusion in this matter would probably not atisfy your husband's concerns. However, I appreciate his willingness to br' g his l concerns to our attention and I assure you they were given a c plete and fair l evaluation.
Sincerely, William T. Russe , Director Office of Nuc1 r Reactor Regulation cc: Chairman Jackson DISTRIBUTION:
l File Center /NUDOCS (w/ incoming), T-5C3 l PUBLIC (w/ incoming), T-5C3 l
ED0 Mail Room (GT96455 w/ incoming), 0-17G E00 Reading, 0-17G21 J. Milhoan, 0-17G21 l H. Thompson, 0-17G21 l J. Blaha, 0-17G21 l J. Lieberman, OE, 0-7H5 F. Miraglia, 0-12G18 A. Thadani, 0-12G18 R. Zimmerman, 0-12G18 B. Grimes, 0-11H21 OPA, 0-2G5 l OCA, 0-17A3 L. Soffer, 0-17G21 !
D. Morrison, T-10F12 l l K. Cyr, 0-15818 l NRR Mail Room (GT 96455 w/ incoming), 0-12G18 C. Thomas, 0-13E16 i l l
G. Lainas, 0-7D24 ;
l S. Bozin, 0-7024 (GJ 6455) 1 l F. Burrows, 0-7E4 /
D. Thatcher, 0-7E4 ;
Tech Editor (BCalure) Comments Incorporated 8/5/96 DISK / DOCUMENT NAME: ,G:\ SHARED \PETN03.REV
- SEE PREVIOUS CONCURRENCES
! To rective a copy of this doctment, ind kate in the box: "C" = copy w/o attachment, "A" a copy w/ attachment, "N" s No copy 0FC BC:EELB:DE/ A D(9[ % 10 OGC ADT:NRR D:NRR NAME JACalvo/ BW e)on MRafky ACThadani WTRussell DATE 08/07/96* $/y/96 / /96 / /96 / /96 0FFICIAL RECORD COPY I
l..
Mr. Charles Morris l the NRR formal generic issue process. He did not do so to the extent necessary to cause the NRC to reevaluate its interpretation of GDC-17.
Sincerely, p ,/
James M. Taylo/ r f Executive, Director l(
for Op'erations (c: Chairman Jackson
/
DISTRIBUTION:
File Center /NUDOCS (w/ incoming), T-5C3 PUBLIC (w/ incoming), T-5C3 l
ED0 Mail Room (GT96455 w/ incoming), 0-17G21 EDO Reading, 0-17G21 J. Milhoan, 0-17G21 i
H. Thompson, 0-17G21 1 J. Blaha, 0-17G21 l
J. Lieberman, OE, 0-7H5 F. Miraglia, 0-12G18 A. Thadant, 0-12G18 R. Zimmerman, 0-12G18 l
B. Grimes, 0-11H21 OPA, 0-2G5 :
l OCA, 0-17A3 l L. Soffer, 0-17G21 D. Morrison, T-10F12
- K. Cyr, 0-15B18 NRR Mail Room (GT 96 55 w/ incoming), 0-12G18 .
C. Thomas, 0-13E16 l G. Lainas, 0-7D24 S. Bozin, 0-7024 (GT96455)
F. Burrows, 0,7E4 D.Thatche)r/0-7E4 Tech Editor (BCalure) Comments Incorporated 8/5/96 NAME:
DISK / DOCUMENT,f Tm rective a copy.c this document,G:\
Indicate {n theSHARED box: "C" =\PETN03.REV Copy w/o attachment, "A" s Copy w/ attachment "N" s No copy
/
l OFC BC(EELB:DE A 4:DE X OGC D:NRR 4 00 NAME /dACalvo M [11ISheron MRafky WTRussell J DATE' #/7/96 Y / /96 / /96 / /96 /k 0FFICIAL RECORD COPY i- '
l f
. . - _ . . - . - . - ~ . - . - . _ - . . - . - . _ . . ~ . . . . . . . . - . - . . - . - . . - _ . . . . . . - - .
I i
Mrs. Carol Morris ,
I I appreciate your husband's willingness to bring his concerns to our attention and I assure you they were given a complete and fair evaluation.
l Sincerely, l
&$ M William T. Russell, Director l
Office of Nuclear Reactor Regulation l
r i ,
I k
i i
l
+ - -