ML20084F163

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Preliminary AO-73-26:on 731006,average Power Range Monitor (APRM) Scram & Rod Block Setpoints Not Set to Tech Spec Values.Caused by Communication Problem.Aprm Adjusted
ML20084F163
Person / Time
Site: Oyster Creek
Issue date: 10/11/1973
From: Carroll J, Fiekeissen K
JERSEY CENTRAL POWER & LIGHT CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
AO-73-26, NUDOCS 8304200612
Download: ML20084F163 (4)


Text

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nor:t ras e r.ntoit gf e.o. oox saa e FORKED RIVER 9 HEW JERSEY e 0$731 v ,i Oct01.ier II,1973 .

[f. t E-f ltr. Janea P. O'Relily i Dim torate of 1:egulatory Operations reg. ton 1 [ i U. S. Atcaic Energy Cosaission. - F 637 Park Avemte * .~ . . ~ ' ' -- ?. Kin; c.f Prussia , Pcimsylvenia - - 19405 - ~ - ~

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Oyster Creek Nuclear Generating $tation Docket No. 50-219 E Prcliminary. I6norn.ul Occurrence Report No 73-26. } E Per a telephone conversetion between .J. L.! Sullivan, Jr.y "and.  ? t>

      ' O. Ct. phi na on acteher 10, JI973, we.are reporting the :nttached cycnt- as-                                                                      E an abc... ual occurrence, althought it is.not clo7r that it-is reportabic.
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L v .. Tochnical. Spccification .4 J1, Tabic .4.1.1,'. Note .2,.'.$thtes, ."At- f x lenct daily during reactor power; operation, the reactor > neutron; flux. penkin,c f::ctor ; hall be estim:sted :md.the.fiebreferenced APRH serra [ e and rol block settings shall.be adjtzstediif necessary,..as specified in  !! Gection 2.5, Specifications (1) (a) and (2) (a)." Tnis. astimato was, . . y in fact, perforned as specified;cnd: corrections were rnde.as required.: ji -i r3

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5 Opei :icra by.telcphene on October. 10,1973? at 4:30 lp.n.t and - by tciceepler on October 11,.1973L at 1:15. pm. w , = SIpn.M . : On Octchor 6, IM3, at: 2:00 :p.n. , the. reactor. startup. to full; E pm.:cr had been halted &ie~tifhNerof71racwiwconden.ute de--:- . =. E t nirieralizers. The,ccro then :.I cutput at.this .tinewas; appron-E e m r-8 m mtely 567 Hiitiand the rceircuintion flow' rate.was 50X10 .lbdnf. l At' thi.+ time the Mninum. Total Peaking Factor 4FF).' was estinated k to be 4.54 and'.the Avaraga Powcr. Pe:ngetHonitort(APRWs);were set conservat.ively,such the,t 100% -on the APRWs corresponded. to-u. 1200 int.. This ist equivalent' to. reducing the neutron ifIn .?.ctan by the put 3,01/PF.'as specified in Tcchnical $pecification - k 2;3.1,a, with some added cargin. Tne 100t/1200 Wt:sotting, g >

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                                      ..that it was caused by a centunication probles.

t , t ou.,m r.:.. ,r, a wm. r. c, r. At '10:00 a.n. on October .7(1973,- the. reactor. neutron flux peak-ing factor uns estimated as:rquired:in TechnicoliSpecification

                                      .4.1, Tchlo'.4.1.1, Note 2, anCicund to be ~4;71. 'The APFFs were then correctly' adjusted to the conservative'100ii/1200 f. int setting.

SAFET SIMII'ICMCE: Dased on the Neutrod.Plux Peaking" Factor of 4;71, as.osticated . at the tino of:the correction, the safety' licit can'bc shown to 6

                                   ' be at 12284rdt:fer the recirculation flow rate of^30X10                                                                                                              lba/hr.

Using the 100%/1400 mit setting of the MPMs, the reactor at

                                     . this condition would have scramed at'1200 Mit, if required.

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torm.AFC *)4 (Ho. h 34. I')4n AE GI c240 Nete and retura. For Ornature. For inforenatloa.

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ia <N.m. .nd unn> imiug atMuns Licensee
Jersey Central over & Light Co. _
11. D. Thornburg, oAiE Docket No.: 50-219 Chief, FS6EB ' -

Abnormal Occurrence: A0 73-26 To (N.m. .nd unas imrin.s acMuns RO:HQ (5) DR Central li es (1) om The attached report from the subject licensee is Regulatory Standards :3) Dir. of Licensing (13) forwarded in accordance with RO Manual Chapter 1000. TO (Name and unit) / IN11ALS REMARAS RO Files / The action taken by the licensee is considered oArE appropriate. Followup will be performed during the next inspection as appropriate. Conies of mom (Name and und) , REM ARK 3

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the report have been forwarded to the PDR, Local lgf.k f l , G )e' 0) ,

17. L. a hton, Senior PDR, NSIC, DTIE and State representatives. The Reaet ector, pm licensee will submit a 10 day written report to PHOhL h0 DATE 10/11/73 Licensing. -

USE OT..A 54DE FOft ADDITIONAL REMARKS GPO 19710 - 44S-469 a e ,

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