ELV-01092, Provides Description of Hardware Changes for Level Instrumentation & RHR Sys Performance Indication,Per Commitment Given in 890202 Response to Generic Ltr 88-17 Re Loss of RHR While Operating W/Reduced RCS Inventory
| ML19332E192 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 11/30/1989 |
| From: | Hairston W GEORGIA POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| ELV-01092, ELV-1092, GL-88-17, NUDOCS 8912060349 | |
| Download: ML19332E192 (2) | |
Text
3,
_,y r-Ioj [
GE>rg a kwer Comparty --
( 333 Piedmont Awnue -
1
,, 9;;
Ty
- Atlant Goorpa 30308
4
^ '-
1Telephono 404 526 3195 '
j I
' a hng Addr6 M
' 40 lnverness Center Parkway.
1
- Post Offce Box 1?SS.
6
. B.rmingham. Alabarna 35201 Telephone 735 868-5581 7
6' November 30, 1989 y 3,yy,, y,yy yy,,,
- W, G. Hairston, til H
~
seniet Vce President f i
Nuclear Operat:ons
!t ELV-01092~
0127
[,
. Docket'Nos. 50-424 50-425 U. S. Nuclear Regulatory Commission ATTN:~ Document Control Desk Washington,.D. C.
20555
. Gentlemen:
'~
V0GTLE ELECTRIC GENERATING-PLANT HARDWARE MODIFICATIONS PURSUANT TO GENERIC LETTER 88-17
'By letters dated December 29,-1988 (ELV-00109) and February 2, 1989 (ELV-00186),
Georgia Power Company (GPC) responded to Generic letter 88-17 related to loss of residual heat removal while operating with a reduced reactor coolant system inventory.- Our>1etter of February-'2,1989 stated that an ' evaluation of hardware changes' for~ level: instrumentation and residual heat removal.. system performance
- indication was underway and that a description of these hardware changes would f
be submitted.'approximately two months after completion of the evaluation.
With regard to RCS level instrumentation, GPC plans to install permanent mounts B
for temporary level transmitters. The transmitters themselves will be installed
[
. prior to entry into-a reduced inventory condition and removed upon exiting the L
. reduced ir.ventory condition. The tygon tubing, which has-been used as a backup p
to the two independent channels of, level indication provided by the transmitters discussed above, will be ' replaced by sight glasees which will be permanently installed, but removed from service when the unit is not in reduced inventory
?
operation.
E
. Residual heat removal.(RHR) pump performance indication will be enhanced by providing^ indication and alarm of RHR pump motor current instability. This will
- be accomplished via-the Safety Parameter Display System (SPDS) and the Emergency Response Facility (ERF)-computer. The Critical Safety Function Status Tree logir'will be revised to include a link to RHR pump motor current during Modes 5 2
'andib.
If motor current instability is detected, an audible alarm will be generatM by the-ERF computer. At the same time the Core Cooling critical safety function will.be illuminated on the SPDS display. The operator will refer to the Core Cooling.' unction via the ERF computer and RHR pump motor current will be indicated or trended.
6:I) i l \\
~B912060349 99? N f
N JDN - ADOCK J5000424 WVL u
6 Q
e.
' Georgia Potw: a q
\\
\\
u e
1 L
U. S. Nuclear Regulatory ELV-01092
' Pace Two l"
GPC believes that these hardware-changes, accompanied by the other measures
' described in our letters of. December 29, 1988 and February 2,1989 adequately address the potential for loss of residual heat removal' during operation with a reduced reactor coolant system inventory.
If there are any questions concerning this letter,'please contact this office.
1 Sincerely, l
W. G. Hairston, III WGH,III/NJS/gm.
xc: Georaia Power Comoany Mr. C. K. McCoy Mr. G. Bockhold, Jr.
Mr. P. D. Rushton Mr. R. M. Odom
. NORMS U. S. Nuclear Reaulatory Commission Mr. S. D. Etneter, Regional Administrator Mr. J. B. Hopkins, Licensing Project Manager, NRR Mr. ;J. F. Rogge, Senior Resident Inspector,- Vogtle 1
1
. - ~ --
n
,-m
-