ML19329F922
| ML19329F922 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 07/02/1980 |
| From: | Manry M GEORGIA POWER CO. |
| To: | |
| References | |
| NUDOCS 8007110366 | |
| Download: ML19329F922 (2) | |
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poca quAUTY PAGES 30 JUL 3 A10 : 1I Ad.in. ofricar t
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01 BAXLEY, GEORGI A 3153 3 RCES Chief V
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DI1CCTOP. OP 7NSPECTION AND ENPORCEMENT P A Officer REGIMi II SUITE 3100 E.gcy Of fieef f'
303 MAnIETTA STangy s h, e Dh ATL/dtT/s, CEORGIA 30303 a
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SUBJECT:
llatch Unit II, Dnchet No. 50-366, Notification of Repor t.a b3 e occurrence No. 50-30G/1980-100.
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NOTIFIED: Mr. Pctc Taylor o'
Mr.
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Rogers "I
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DATE:
July 2, 3980 DATE: July 2, 1980 TIIC: 0845 EDT
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DESCRIPT2 O'; OF ICPORTABLE O 'CURRC:s CE j
3rtitial Condition k
l At the time of the occurrer: es (July 1, 19 80 at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> CST and y
July 2, 1980 at 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> CST), Unit.Il was operating at 981 power.
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- nt.ure,of Occurrence i
1;hile perf ortning survei13ance pr.ocedures HNP-2-3002, High Drywel3
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Preunure (RPS) Functional Test and Calibration, and HNP-2-3172M, 3:.,
High Drywell Pressure (HPCI, RCIC, Core Spray) Functional Test and Ca3ibratio:, Jt was found that switches 2C71-N002A thru D and if 2E11-:;011A thru D were out of acceptable tolerance allowed by r,
Technical Specificatiotis.
Acceptance criteria is less than oc equal 3,
to 2 psig increasing..
All switches actuated above this point.
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- S. E 1mmediat,e Corrective Action Y
y, All high drywell,pressur.c switches on'HNP-2-3002M and NNP-2-3172M were recalibra'..cd per NNP-2-5279, Darksda3c Pressure Swit.ch Calibration y,
Procedure, and are now within acceptable tolerances as allowed per
'ischnical Syccifications.
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F Setpoint. drift can be attributed as the cause of this occurrence.
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i, S,upplemental Corrective Action investigation is underway to t.ry and determine if any other conditions t-An these instruments to drift out of tolerance.
are caucing Statur. oi )tedundant or Bnchup Systen.s systems are available and capable of performing their
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All redundant intende.d f unc t. ion s.
3mpact on Other Units because Unit I uses the same The occurrence is applicable to Unit 1, ICIP-1-3002 was switches for !!igh Drywell Pressure.
type of. prennurc with satisf actory resul t.s and 11SP-1-3172 perf orced on June 30, 1980, was perior:ned on.3uly 2, l 'J B O, also with satisfactory results.
gusti_fication fo,r Cont.inued Operation Ccnt.inued cperation is justified due to 1.hc recalibrat.fon of the liigh Drywell Pressure Switches.
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