ML20069C914

Annual Plant Mod Rept,1981

ML20069C914
Person / Time
Site:	Peach Bottom
Issue date:	07/19/1982
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20069C911	List: ML20069C910 ML20069C914
References
NUDOCS 8207210363
Download: ML20069C914 (9)

Text

,

PEACH BOTTOM ATOMIC POWER STATION UNIT NOS. 2 AND 3 i

ANNUAL PLANT MODIFICATION REPORT January 1, 1981 through December 31, 1981 i

Submitted to The United States Nuclear Regulatory Commission Pursuant to Facility Operating Licenses Nos. DPR-M & DPR-56

. Preparation Directed By:

! W. T. Ullrich, Super.4ntendent

Peach Bottom Atomic Power Station I

KO oh7 PDR_

l /

4

~

' PEACH BOTTOM ATOMIC POWER STATION ANNUAL PLANT MODIFICATION REPORT 1981 This report for Peach Bottom Atomic Power Station Units No. 2 and 3, License Nos. DPR-lh and DPR-56, is issued in fulfillment of the reporting requirements of 10 CFR 50.59 It describes changes made to the facility as the facility is described in the safety analysis report. The report covers modifications that were complete in 1981.

For each of the modifications, tests or experiments included in this report, the safety evaluation performed indicated that an unreviewed safetyquestionasdefinedin10CFa50.59(a)(2)wasnotcreated; inthat(i)theprobabilityofoccurrenceortheconsequencesofan accident or malfunction of equipment important to safety previously evaluated in the safety analysis report was not increased, or (ii) a possibility for an accident or malfunction of a different type than any evaluated previously in the safety analysis report was not created, or (iii) the margin of safety as defined in the basis for any technical specification was not reduced.

/

t l

t l

l

[

l

Page 1 Common control Room Interior Doors Changes were'made to doors 321, 322, 326 which include nelf-closing mechanisms for the doors and louvers and edae reals.

~

The purnone of thin modification in to prevent rmoke infiltration into the main control room in the event of a fire in one of the adjacent roomn.

noconhiner Sample connection A cample connection has been installed in the. suction line-of the reconhiner samp3e cump in order that manual ramples of the recombiner discharae can be gathered for chemical analycis.

Seirmic Uncradinn of Miscellaneoun Fans Podificationn were undertaken to provide assurance *that the fanc (17 total) in the following systems will be operable in the ovent of a design eartheuake or a maximum credible earthquake.

Standby Gas Treatment System Control Room Energency Presh Air Supply Energenc, Switchqear Exhaunt Battery Poom Exhaust Cardox Poom Supply, Diesel Generator Building Diesel Generator Supply Control Poom Fresh Air Supply The modification included addition of structural bracing to nome of the fan franes and deflection limiters to all fan frames.

~

! Control Room Erercency Vent Fans Shift neals have been installed on control' room emergency vent fans OAV-30 and and OBV-30 in order to prevent j pulling of unfiltered air into the syrtem.

4

Page 2 Hot-Snot Tndicators for Emeroency Load Centers Due to the inaccecsibility of the existing hot spot indicatorr, which are innide the trancformer tank, a nodification han been completed and innta11ed, external temperature rensors on trannformers E-134 and E-324 of the emergency !oad centers.

penl ace Paduaste Floor Drain Pil ter Transmitter The existinq floor drain filter transmitter (det 425) , a GEMAC GE552, has been replaced with a Ronemont IISID-PGn22M9. The GEttAC instrument f ailed and no parta are available.

FSM Seismic Unorade A modification has been-comnleted in order to bring the Emercency Service Water booster nunn up to the recuired seismic capability. Thir nodification involved the installation of dowel pinn at the end chields.

Unite ? & 3 _

nefuel Crane Dunt Cover Drain Hole A rodification to the refuel cranes has been completed in order to prevent the buildup of grease inFide the dust coverr on both endn of the main hoict brakes. The nodification concirted of drilling a 1/4 inch hole in the duct covers to reroute the oil drainaqe back to the main oil reservoir.

l l

l i HPCT/RCIC Isolation Lonic In order to prevent spurious isolation of the HPCT and RCIC synten due to a high eteam flov trannient experienced during rynten rtart-un, time delay relays have been adced to the eteam line high flow icolation logic. Thic ic a UUPEG 0660 recuirement (I T .K . 3.15) .

l l

l i

I

Pace 3 Toru" Vont Unader Dnfl octorn Dorlectorn have boon adaed to tha torun vont henaerr to minimize the swell innact loadino durinq the inital clearino of air.

m oruc Vent Header Downconer Tier Downconer ties were aMAed to tho torun header in order to nurport latoral loads which nay occur durinq a LOCA.

"nin Stnan Poliof Val"o Dircharce Ouenchern and 9unnortn chie modification wac nado in order to withstana tho loadinn idontified duriro tho Tiark I etudion. The cuenchern and cunnortr "er"e to mitigate the initial nrencuro surgo roruitinc fron air ir the linnn and to nirimize condorration cauned in"tabilition.

Unit 9 Only Scran Svrten Air nunn In responne to IF Bulletin 80-17, a system was installed to automaticallv ceran the roactor unon low air nrercure in the rcran rynton nir n upol v heador. *his rodification involved the l in-tallation of nrecruro switcher on the runnly header which l activato tho back-un neran valven unon a low crensuro condition.

The modifiention wi11 Se re: roved upon comol etion of tv e

! codifications to ?rran rvnten dircharoe pipino.

l nefuel PriPan Poa Block Tnterlock Tho r e f uel bri?qe truck ewitch, a cinale contact ncchanien, van r epl a ced 'eith a two contact nwitch in ordor to nernit the bridqe to remain de-onerqizod with tho reactor noan switch in the ntart-up norition. Thin nodifiO tion wn" *erformed in reroonOn to CPro. STL-248.

Page 4 Cardox natterien A modification wan completed which installed a protective screen around the cardox fire protection system batteries to provide protection from inadvertent contact, r

Waste Domineralizern Due to ongoinq dif ficul ties, piping has been modified and a rectrictino orifice installed on the waste demin line to prevent damace to the resin bed during filling operations.

Recirculation Pumn MG Set Ventilation A modification to prevent side movement of the vane houning and to strengthen the entire assembly was completed.

This modi fication connisted of the innta11ation of 1 1/2 x 1 1/2 anole iron to the niden of the vane bouning and two tie rods through the riden of the ansembly.

FCTr Pumn Suction Preenure Trannmitter A General P,lectric model 55TPT has been repl aced by a Po"crount Alpha Line "rannnittar Model ll5P7R22 for the PCIC pump suction nrennure transmitter. This was necesnitated an a result of damaqe and lack of parts availability.

Unit 3 Only RnR Loon Seloction instrumont Line

! The one inch r.HR loop nelection instrunent line was cut and cappna due to leakane in a portion of the line between the connection to the 270 degree recirculation riser and penetration N52-B. The leakage was detected during the ISI progran. Loop nelection logic in no longer utilized, therefore, thir line in no j

longer necessary.

Page 5 4KV Control Cable Re-route A modification was performed in order to bring the unit into compliance with the PSAR with regard to safecuards ceparation. This modification involved re-routing of some control cabl es to the 4KV emergency buren , canning of control switchen, relocation of other control switches and the innta11ation of auxiliary relays an interporing contacts in nome control circuits.

Reactor necirculatino Pumn Soal Prennure Sennina Tine A 1/4" restrictino orifice has been inctalled in the reactor recirculation pump seal nrennure sensing line in order to neet FSAR committnent regarding inntrument lines which penetrate nrimary containnent.

HPCT Tenneraturo Switch An obsolete ASUCROFT tennerature suitch has beon replaced wi th a Fenwal 50 to ?50 decree F temperature switch.

Radiation "onitorina Batterien The '4V batterios 3AD27 and 3cD7 have been replaced with batterien of an improved denion.

Autotrancfor of PCIC

! A modification has been connleted in renconno to MUREC 0737 item II.K.3.?2 which tranrfern the RCIC ruction to the morun l

uhen tho condennate rtorace tank level falln to 10,000 callonn.

i l

'f ain Steam Irol ation Valvo Duo to strinned threadn, a hel icoil insert han heen inrtalled on the 06D "SIV cyl i nder bl ock. "hir action arnures l

that the manifold will ntay e f i>:ed to the cylinder block.

Pane 6 Peactor Mater LoJet Pocorder -

In renponne to a MunEG 0737 recuirement, a two pen recorder has been inctalled to monitor reactor water level over the normal operatinq range and the bottom of the active fuel.

The wide range section on the recorder coverc -165 to +50 inches wherean the fuel zone nection covers -325 to 0 incher.

Gracole Head Modification A new mounting hole for the grapple head light has been drilled and tapped in the grappic head. Thin new hole was necennitated due to stripping of one of the original holen and will provide ponitive mountino of the light.

Acram Dincharoe volume Modi fication In responne to IE Bulleting 80-17 concerning the failure of control rodn to fully innert neveral modificatione have been made to the neram discharqe pioing including:

1) Peplacement of exintina pininn rrn- S ir: charge vol ume to instrumont vol.ume witn 8" pipe.

2) Addition of redundant inolation valves on the inntrument vol ume vent and drain.

3) Pemoval of relief valve PV34

4) Pe-routing of the level detection piping peactor Buildinn Wall Penetrationn Eicht penetrationn were made through the roactor buildino wall. Si:' of the nenetrations (10 inches in diamoter) were temporary and have been olugged and 2 (8 inchen in diameter) are parmanont. The permanent penetrationn were cloned and leak tented. There penetrationn were uned to provide pathwayn for the introduction of corprenned qaren, comprenced air, electrical lendo and weldinq connectionn recuired during modification work within thn drywell and torun.

a Page 7 Control Rod Drive Coolina Water Header Flow Transmitter Renlacement FT-3-03-212, a GEMAC Model 555111BCAA3B , has been replaced by c Posemont 1151-5822-T0002-PB due to the fact that the GEMAC unit wac defective and is no longer manufactured.

Scran Discharce Header Water Level Detectors Ultrasonic detectors were ins tal led in the low point of the two scran discharge headers in order to detect any accumulation of water. This work was done in response to IE Bulletin 80-17.

D RHR Suction Drain Pipino The drain piping on the suction of the D RHR pump has been removed and the connection point repaired. This modification was performed in order to secure a leaking pipe and return the piping to the original configuration.

RHR Elbows on Discharoe to Torus A modification was completed which added elbows to the RHR discharqe lines to the torus. The purpose of this modification is to induce water circulation within the torus, thereby preventine thermal FtratifiCation and local heat concentration.

Penlacemont of Core Soray Pinino A modification to the core epray piping was completed which replacea all of the pipino from the reactor vessel safe ends to first valve. The purpose of this modification is to replace piping which may be susceptible to intercranular stress corrosion crackinq with material which is l ess susceptible.