ML20141M061

Forwards Secondary Chemistry Annual Rept for 1991. Rept Summarizes & Evaluates 1991 Condensate,Feedwater & Steam Generator Water Chemistry Operating Experience & Repts Total Time Secondary Water Chemistry Parameters Out of Spec

ML20141M061
Person / Time
Site:	Seabrook
Issue date:	03/20/1992
From:	Feigenbaum T PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NYN-92033, NUDOCS 9203310263
Download: ML20141M061 (6)

Text

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New Hampshire

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Ted C Feigenbaum h

Pieddent and CNei Exec &e Omcer NYN-92033 March 20,1992 United Stat s Nuclear Regulatory Commission Washington, D.C.

20555 Attention:

Doctiment Control Desk

Reference:

Facility Operating License No. NPF.86, Dock;t No. 50 443

Subject:

199'l Srcondary Chemistry Annual Report t

Gentiemen:

Enclosed is the Scabrook Statio1 Secondary Chemistry Annual Repost for 1991.- This report, submitted in accordance with litanch Te :hrucal Position MThil 5.3, summarires and evaluates the 1991 condensate, feedwater, arni steam generator water chemistry operating experience and reports the total time secondary water chemistry parameters were out of specification.

Should you have any questions regarding.his report, please contact Mr. James M.

Pesebel, Regulatory Compliance Manager, at (603) 474-9521, extension 3771 Vesy truly yours, y

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Ted C. Feigenbaum

'inclosureis)

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9203310263 92032C

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POR ADOCK 05000443 I

New Hotapshire Yankee Division of Pubhc Service Cornpany of New Ha.npshire

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,l P.O. Box 300 c Seabrook, NH 03074

• Telephone (603) 474452) l

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United States Nuclear Regulatoiy Commission March 20,1992 Attention:

Documeni Control Desk Page two i

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cc:

Mr. Thomas T. hiactin i

Regional Administrator U.S. Nuclear Regulatory Com nission Region I a

4*!5 Alicudale Road l

King of Prussia, PA 19406 Mr. Gor don li Edimn, Sr. Project Manager Project Directorate : 3 l

Division of Reactor Projects U.S. Nuclear Regulatory Commission Washington, DC 20555 i

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j Mr. Noel Dudley l

NRC Senior Resident inspector P.O. Box 1.149 Seabrook, NH 0387/

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l The Secondary Chemistry Annual Report for 1991 summarires and evaluates the co f

feedwater, main steam and t, team generator chemistry, as well as documenting tota sF snecification hours on these systems.

COMMERCI AL POWER OPERATION CYCII I 1.

The evaluation of secondary chemistry for this operational period is from January 1 The total at which point rampdown commenced for refueling.

d main 1991 to July 25, 1991 out of specification hours for the steam generators, condensate, feedwater an steun hring this time period are listed below.

2280.9 hrs

1) Steam Generators

2) Condensate 245.5 hrs 694.6 brs

3) Feedwater 743.0 hrs

4) Main Steam The majority of out-of-specification hours were attributed to either specific excu rator of short dura; ion or to maintenance work requiring such activities as steam geneN blowdown isolation or ope:ational problems.

noted during this second half of Cycle 1.

Steam Generator blowdown The Chemistry Performance index (CPI) everaged 0,35.

The cation conductivity and sodium averttged 0.44 pnhos and 2.4 ppb respectively.

dissolved orygen was 3.8 ppb.

Valoes w re mean condensate pump dist'aarge than 30% utilizing monthly calculated from plant data at a power level greater

averaps, 11.

HEFUELING Gion began shutdown in preparation for 25,1991 at 1125 brs, Seabrook St:The rampdown commenced a day early On July d at a refueling (RF01).

unidentified icak from the RCS whien was later determined to have occurre cryofit conutetion in the pressuri7er steam space sample line.

llideout Return Study A.

25,1991 at 1200 brs, the Chemistry Department began a hideout icturn Program sampling ended at 1500 hrs On.luly study on its model F steam generators. Total cumulative conteminant rc: urn and total grams removed via blowdown, from all the steam generators for all imput on July 26, 1991.

was 796 g and 360 g, respectivel).

B.

Sitadge Lancing, Foreign Objects Search and Retrieval (F OS AR) und inspectinus In preparation for RF01 rnaintenance and sepair activitici, the condensste dry.

Il e steam generators wtre feedwater systems were dreined and left drained and refilled sevent tlmes, without chemical additior., to aid in steam The generator couldown and reroosal of hideout return bulk water impurities generators were lef t dry in prepatution l'or sludge lancing.

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From July 29 to August 8,1991 sludge lancing and FOSAR were perfoimed ca Seabrook Station's four ' steam generators, liigh pressure., lancing min 3; eamera guided jets to spray between columns enabled the removal of 143.5

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pounds of sludge total from all foul steam generators.

A small object was found lodged in the 'C" steam generator and could not be removed.

The four tubes surrounding the object were plugged to obviate potential leaks. Also performed was a blowdown lanc/tubesheet, upper llow distribution baffle and first support plate inspections on "C" steam generator'.

Future outoge inspections will be scheduled to document and track any potential concerns.

C Wet 1,ny up Wet lay up chemicals were added to the g;neiatots on August 21,1991 and August 22, 1991. Delays in the filhng and chemical addition to the steam generators were caused by master system tagout overlaps, system componen'-

maintenance und major electrical panel outages, On August 23, 1991 the ability to recirculate the steam generators was lost due to an c!rctrical panel outage.

Out of-specification hours attributed to the wet lay up delays and inadequate j

recirculation are as followr 1

1

1) flydrarine s 75 ppm. = 1668 3 hrs

2) pil' s 9.5 = 1317.7 hrs l

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CYCif 2 - START.UP FROM RF01 The condensate sy*. tem was filled on September 15, 199: and placed on long path j

recirculation the follovring day. The first hydrazine addition was made on September 1

16, 1991.

Numerous hotwell dumps were performed for system purification.

The Operations Department began drawing a vacuum on September 18, 1991.

Draining and filling of the 'A' and "C" steam generators commenced on September 29, 1991 and on October 3,1991 for the 'IP and D' sicam genciators.- The process was complicated by contamination of the Demineralitr'i w W Mer System which J

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_ o curred on September 30, 1991, An outside water treatment vendor was contracted s

to supply demineralized water for staat up while clean-up of the contaminated systems occur red.

y f-The plant entered Mode 4 on October 5,-1991 at 2210 and Mode 3 on October h, 1991 at 1900, 11 lowdown was established at 2300 on October 7,1991 but was limitcd 3

to 20 gpm per steam generator due to physics testing and water inu utory. Criticality j

(Mode 2) was acideved on October 9.1991 and Mode 1 attained on October 12 at M 56. - lilowdown was increased to 70 ppm per ' steam generator. The remainder of the start up was facil!!ated by. having rnaximum blowdown, made possible-by the contracted vendor.

Power escalation continued through the month. The plant texhed 100% power on s

October 29, 1991.

The total out-o t'-specification hours for steam generatms, condensate, feedwater and mainsteam during startup and power escalation are listed

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below:

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L Steam generators - 5t:6.5 br$

2.

Condensate

- 417,4 hrs 3.

Feedwater

- 3S5.6 hrs t

4, Main Steam 232.0 hrs IV.

COMMERCIAL PO%TR OPEHAllON CYCLE 2 The evaluation of secondary chemistry for this operational mode is from October 29, 1991 to December 31, 1991 for out of-specification hours end from October 19, 1991 when power ascended above 30% to December 31, 1991 for plant per for mance pa ramcDr A.

leedwater and main steam are hsted below.The total out of specification hours for t 1,

Steam Generators - 160.6 hts 2.

Condensate 40.0 hrs 3,

Feed water

- 140.0 hrs i

4 Main Steam 68.0 hrs 5

The cujority of out-of specification hours were attributed to a spteific excursion caused by sulfate intruilon following a dcmineralizer being returned to senice, or maintenance performed on plant systems

nstai.ces, secondary system parameters displayed downward tWith the exception of the a rends following startup.

The Cbemistry Performance Indet b

averaged 0.43, Steam generator blowdown cation conductivity and sodium uveraged 0.36 pmhus anti 2,8 ppb respectively.

The mean condensate purnp,iischange dissolved oxygen was 6.9 ppb. Values were calculated uti'iting monthly.wcrages, s

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