ML19308A516

RO 77-26/1P:on 771114,quadrant Power Tilt Exceeded +2.66% W/Reactor at 15% Full Power During Power Escalation Following Reactor Trip.Within 4-h,quadrant Power Tilt Not Reduced

ML19308A516
Person / Time
Site:	Crane
Issue date:	11/15/1977
From:	Ohanlon J METROPOLITAN EDISON CO.
To:
References
NUDOCS 7910250761
Download: ML19308A516 (2)

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/ METROPOLITAN EDISON COMPANY,,.

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POST Of7?CE Box 450 M3 DOLE'OW N cENNS'et.V ANia t~c5-

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Dtreetorate cf Regulatory Operations

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- :perat;.n- *lcense DPR.50 Dcchet 50-289 Tubjcet:

Repertable f;ccurrence Sc. 77-26/LP Deer Mr. Gricr: -

f This telecrar. is to confirm the telecen betw en Mr. C.

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j Kunder (TMi-1 super nsor Operet t ens! a n d S*

F.. '. Kellec= (occion t-Nac) 4t 1140 hours0.0132 days <br />0.317 hours <br />0.00188 weeks <br />4.3377e-4 months <br /> on 15 Novernher 1977 A viclat wn of the Technical Specif1 =tten 3. 5. 2. 4. et occurred in that the quadr 9.-- pn%cr tilt was in excess of '2.58 f er ; renter than 4 beurs anc th.= prut c-ion s rste: rcecter pcwcr/1:.calance "nvelupe trip setpcints aere net r"+.:e;d 2 tercent in power tot each i percen' talt within that.s mr =? pericd.

At 1713 hcurs en.14 Noterbar 1977, T:ed" ' l ower tilt execeded

• 2.66% w:th the reacto.r at 15*. full ower durinc OcNer escalation e

following reactor trip frem ICCt Full power.

With2n 4 hcurs the quadrant I

power tilt was not reduced below +2.6% and the protection system reacter pcVer/ imbalance c :talene tric setpoints had not been reduced 2 percent in power for eccP 1 pcr:ent tra t.

.i Reduction '[5 trip setpcints becen at 214.~ hrs a:-d was in pr : r%;

whan tilt Was returned to the 2.'5 cercent 11.:.Lt.

~;x.e'1! ate ccrrectite action we '  :? "c deter: 1. c the cause fer tne tilt t.- c.xarining incere ictuctor data r.d centrel red resttiens.

Pcwer 9 sed 19tlen wa3.1.rlted tc thi fu'l pcWCr 3nc red indCX 11.it3 were reducad to cc:.cly with Technarsi 5pecification 3.5.2.4.d and 3.5.2.4.e rections 2 ;r.d 3.

Cund wn' :- :we'r t il t at 2343 'Mur'; en 14 Neva m.

w._ - back with 11.ntts

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I Mr. Boyce H. Crier 15 November 19 7 A more detailed evaluatien as to the cause of this incident.

and any long term corrective action which may be necessary will be discussed in the follow-up repor*..

'Mry truly yours,

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