ML19327A527

Responds to IE Bulletin 80-17 & Provides Manual Scram Test Results.Scram Discharge Vol Vents Lines Verified as Functional & Full Operator Training to Be Completed as of 800802.Recirculation Pump Trip Installed

ML19327A527
Person / Time
Site:	Hatch
Issue date:	07/31/1980
From:	Widner W GEORGIA POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
0089, 89, IEB-80-17, TAC-42218, TAC-42219, NUDOCS 8008060328
Download: ML19327A527 (3)

Text

s oosi July 31, 1980 h

GeorgiaPower v.. uan,

me memn en mm United' States Nuclear Regulatory Commission Office of Inspection and Enforcement

REFERENCE:

Region II - Suite 3100 RII: JP0 101 Marietta Street, NW 50-321/50-366 Atlanta, Georgia 30302 I&E Bulletin 80-17 ATTENTION: Mr. James P. O'Reilly Gentlemen:

The following information is submitted in response to I&E Bulletin 80-17:

In accordance with Item 2 of the Bulletin, a manual scram was performed on July 26, 1980, on Hatch Unit 2.

The scram discharge volume responded properly during this test; however, two scram level switches, 2Cll-R013A and D were found to be failed and did not respond during the test. The failure of these switches did not affect the performance of the SDV, and no other problems were noted.

Investigation of the switch failure is continuing. The data requested in Item 2 is given in Attach-ment 1.

An automatic scram will be performed today, July 31, 1980, on Unit 2.

In accordance with Item 3, SDV vent lines were verified to be functional at the conclusion of the above tests.

In _accordance with Item 4e, full operator training will be completed as of August 2,1980.

In accordance with Item 7, both units have RPT installed for both Turbine Trips and Generator Load Rejections at power levels above 30%,

as well as ATWS RPT trips at a pressure setpoint of 1120 psig and a 3

level setpoint of -38 inches. This item is therefore not applicable.

Should you have any questions in this regard, please contact this office.

Very truly,yours, eh /bc

! f S

,/,V-/. A. Widner REB /mb

/

cEnclosure Sworn to and subscribed efore m this 31st day of July,1980 (gy,

/

Notary Puetic, Gwgia, State at targe My Corntmssion Empires Sept. 2o,1983 N9fary Public xc: Director of the Office of Inspection and Enforcement Director of the Division of Operating Reactors, Office of S

Nuclear Reactor Regulation i

8008060

'B 2 %

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ATTACHMENT 1 HATCH UNIT 2 MANUAL SCRAM TEST RESULTS-Bulletin 80-17 Item #1 Description Results 2a All rod insert time, sec approx. 5.9 individual rod scram times:

avg. 06 notch insertion, sec 2.568 max. 06 notch insertion, sec 3.090 min. 06 notch insertion, sec 1.718 2b Scram solenoid valve solenoids Yes deenergized upon receipt of scram signals 2c Scram air relieved through backup valves Yes Backup valves remained open during presence of scram signal Yes 2d Time from scram initiation to: (sec closure of not drained alarm 24.2 switch closure of rod withdrawal block 38.73 switch closure of reactor scram switch 35.7 (avg.)

2e All sec Vent valve P010A opening time 9.1 Vent valve P010B open':..g time 9.7 Drain valve F0ll opening time 12.3 Vent valve F010A closing time 30.48 Vent valve F010B closing time 31.02 Drain valve F011 closing time 24.07 2f Delaf from scram initiation to closure of:

Vent valve F010A, sec 30.48 Vent valve F0108, sec 31.02 Drain valve F0ll, sec 24.07 29 SDV water analysis results:

Filterable solids, ppm 40 chlorides, ppb less than 50 turbidity, RTU 50 SiO, ppb (after filtering) 26 2

2h Time from scram reset to:

(min: sec)

North SDV bank, SDV scram switch 3:46.8 N0138 clears South SDV bank, SOV scram switch 7:05.4 N013C clears REB /mb-j 7/31/80

+

ATTACHMENT-1 (Cont'd)-

' HATCH UNIT 2 MANUAL SCRAM TEST RESUCTS Bulletin 80-17 Item #1 Description Resul ts 21 SDV & associated piping free of Yes water following scram 2j

~10 second delay on scram reset Yes functioning properly 2k Comparison of results OK 1

3

+

4 5

1 t

9 i'

i REB /mb l-7/31/80 S

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