ML19338E040
| ML19338E040 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 08/29/1980 |
| From: | Widner W GEORGIA POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-80-17, NUDOCS 8009240367 | |
| Download: ML19338E040 (2) | |
Text
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l Georg5 Power'Cornpany ?
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' 230 Peacntree Street E '
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~ Atlanta Georgia 30302, LTeicphone 404 522 606o U S M R O R E GI,. g '..
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,0 SEP2 - All : 33 GeorgiaPbwer ge Pres dent and General Manager V
August 29, 1980 U. S. Nuclear. Regulatory Commission'
-Office of' Inspection and-Enforcement
. Region II
. Suite 3100
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REFERENCE:
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101 Marietta Street, NW ~
-321/50-366 D Atlanta, Georgia 30303 I&E Bulletin 80 ;
" ATTENTION: Mr. James P.LO'Reilly
~
GENTLEMEN:
t The following information is submitted in response to I&E Bulletin 80-17, Supplement 3.
-Regarding Item 1 of the Bull are.an integral part of the scrametin, the instrument volumes 'on Unit 2 discharge volume; therefore, this item is not applicable. Unit 1 'does have 2-inch piping connecting the instrument volume-and the SDV; however,-the hi-level (scram) switches are connected directly to the SDV. 'Therefore,' the concern of this item is not applicable.
. At present, the following procedures concerning Supplement 3 are in
'effect:at Plant. Hatch:
g 1.
HNP-1-1920 Loss of-Instrument Air Plant service air is isolated at.70 psig decreasing.
Nonessential r
instrument air is isolated:if the pressure drops-below 50 psig.
4 Essential: instrument air does not isolate.
If the-recovery of' the air supply is not possible-immediately, then the reactor is manually scrammed.- The CRD system uses L
essential instrument air and is annunicated at 70 psig decreasing air pressure.
I 2.
-HNP-1-1940 Loss of CRD' System This' procedure-requires that'if two or more CRD's indicate high temperature alarms annunciate, then the ~ CRD drive temperatures are_ monitored closely, and all drives that' exceed 4000F are scram time tested.
3.
HNP-1-2424 Rod Drift.
If an alarm is_ received' indicating that a control rod has drifted
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'from its latched position'and the cause of' drifting cannot be corrected, then the rod is fully inserted and electrically disarmed.
9 Also required is that reactor.. engineering be notified to determine.
lwhether a. limiting control rod pattern exists.
4 1
80.0924 0 8 6T-
' OFFICIAL COPY
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GeorgiaPbwerA U. S. Nuclear; Regulatory Commission Office.of Inspection and Enforcement August 29, 1980 Page Two 4.--
HNP-1-2409 SDV Not-Drained
~
If an alarm is received in the control room indicating that the.SDV is not empty due to either a post-scram draining or due to leakage accumulation, the following-steps are to be taken:
-a.
Check that the SDV drain and vent valves are open.
b.
Check for partially open scram discharge valves if a full scram-is not present.
c.
Observe rod display panels for drifting rods.
~d.
Check the individual CRD module SDV lines 'or abnormally high f
temperatures.
In accordance with Item 2 of the Bulletin, a standing order has been issued requiring a functional test of all 6 level switches (scram and rod block) prior to startup following a scram on either unit.
.Please contact this office if you need additional information in this regard.
Sincerely, 7s:d.2/ b' 1
W. A. Widner REB /mb
-Sworn to and subscribed before me this 29th day of August, 1980.
Notary PGblic, Georgia, State at Large
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Wcommission Leires sept.29,1981 i
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' Notary Public Jc:
Director of the Office.of Inspection and Enforcement
~ Director of the Division of-Operating Reactors, Office of
- Nuclear Reactor Regulation 1
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