ML19338E040

Responds to IE Bulletin 80-17,Suppl 3.Outlines Procedures in Effect Re Loss of Instrument Air,Loss of Control Rod Driveline,Rod Drift & Undrained Scram Discharge Vol.Function Test of Switches Required Prior to Startup

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 ?

' 230 Peacntree Street E ' *

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.Li i Post Offee Boi 4545 '

~ Atlanta Georgia 30302,

!f-j{ ' LTeicphone 404 522 606o U S M R O R E GI ,.- g- '..

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,0 SEP2 - All : 33 GeorgiaPbwer V

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,, dent and General Manager -

August 29, 1980 &

U. S. Nuclear . Regulatory Commission' . .

-Office of' Inspection and-Enforcement .

REFERENCE:

. Region II . Suite 3100 ~

RII: .0 ,

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 discharge volume;volumes therefore, 'onthisUnit item2 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 g 'effect:at Plant. Hatch:

1. HNP-1-1920 Loss of- Instrument Air r Plant service air is isolated at.70 psig decreasing. Nonessential  !

4 instrument air is isolated:if the pressure drops-below 50 psig.

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.

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If an alarm is_ received' indicating that a control rod has drifted

'from its latched position'and the cause of' drifting cannot be corrected, then the rod is fully inserted and electrically disarmed.

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' Also required is that reactor.. engineering be notified to determine.

, lwhether a. limiting control rod pattern exists.

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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 linesf'or abnormally high 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.

i Notary PGblic, Georgia, State at Large

[L h( M: /]/, Wcommission Leires sept.29,1981 Q ' 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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