Text

Monthly Operating Rept for Apr 1984
	ML20091K383
Person / Time
Site:	Cook
Issue date:	04/30/1984
From:	Gillett W, Will Smith; INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	; NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
	NUDOCS 8406070042
	Download: ML20091K383 (13)
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. s D C C.-..v O. 50-315 D.u..-. 5-2-84 C'g,..es_-..-

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W.T.

Gillet-

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c???r"Nt I'ATUI Donald C. Cook 1 Nor:s

1. Uru.: N===:

April 1984-

.gepor:.:.,. 3..:,

3. I I: = sed Th-- ' ?:wer C.iW:}:

3250 1152

4. N:=ep!:ia ?.r.;(Cra:s $1W ):

5. Desi;= E==i=! R::ia:(Ne:11We):

1030 1056

4. S'- : :::= DependshIe C:p::i:7 (Cross 31Fe):

T. 3f:xi=..= C :=d:b!: C===:7 (N:: 3!WeJ:

1020 S. If C.::; s C:= in Qp::i./ R::i ;: (1::== Nc=h::, i..:==;: -) Sis:: I ::: Reper:. Cis e R::.::ns:

9. Power Leve! To Whi:h R...=i= !. !! Any (N::.MWe):

8

10. R=:or.s For ?..=i::i =.If A.=y:

Pis 3tonth Y:.ao. car Cu==I::ive

11. Hours != R:;:..ia; ?::i:d 719 2.903 81.791

12. Nc=h r of Hou:s R==:r '" s Cri:i=1 649.8 2,656.9 60,274.9

13. Re:=:r R=e.:ve s'=:d:v.n E==

0 0

463

14. Ho= Cc:=::: Ca.LI:=

640.3 2,633.2 58,976.9 0

I5. U. !: R: serve Shutdowr: Ec==

0 321

16. Cross Th===! I ::;y Cc:=::d O!wH) 1.855.391 7.AlR.149

_172.162.404

- 17. Cross E =:=iI:_. ;y Ce==::d a,MWm 608,060 __,

2.570.100 56.496,390

13. Net E!:=i=1 Z:.:;y Ce===::d C4WE 584,248 _

2,472,778 54,353,118

19. Unit Servi =.::=:r 89.1 90.7

-74

20. Uci: Av.il=hi!I:7.:=:or 89.1 90.7 74 79.7 83.5 66.9

- !. Uni: C:::=i:f 7:=:r(Usin:.'.! C Nec) 7 8. 9 82.7 64.1

22. U..it Qcecity. :::::(U:in; OEy. Net, 10.9 9.3 7.9

'3. Uni:. Tor::d Cu=;e R: :

24. Sh= downs 5ded !:d Cver Ne..: 5 Ston:.ts (Type 2:::.: d 0u=::=n of I...3:

Shutdown Schedule September 1,1984 for surveillance testing.

35. If Sh:: Down A: End Of R:F::t ?:ried E:::=:: d 0:t: Ci3::r:':::

25. Units la Tes: 5::::s iPri:r to C:====!:10;: -::ical:

Fore =:t Acieved IN I. ',' ' &..... *... A 'J". '

IN..TIA u.

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PDR i b:

AVERAGE DALLY UITT POWER LEVEL DOCKET NO.

(n-31s UNIT 1

w, DATE 5-2-84 CCMPLETED BY W.T. Gillett-TELEPHONE 616-465-5901

. MONTH Anril-1984 DAY AVERAGE DAILY PCWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWE-Net)

(MWe-Net) 1 713 17 to37 2

1032 18 1022 3-803 19 865

.4 nio 20 1034 5

1032 21 1031 6

R45 22 1031 7

610 23 1032 8

916 24 1032 9'

224 25 1025 10 25 982 11 27 871 12 126 812 23 13 740 811 29 14 1032 30 811 15 1035 31 16 1028

!!!STRUCTICNS On thit femat If st the average daily unit pcwer level in MWe-Net for each day in the recortino month.

Ccman+a en *wa an,---

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1 DOCKETNO. 50-315 UNIT SIIUTIK)WNS AND POWER REIR)CTIONS D.C. Cook - Unit 1*

UNIT NAME 5-7-84 IDATE B.A. Svensson COMPT.ETED BY REPORT MOVilg APRIL,1984 TELEPiloNE 616/465-5901 PAGE 1 of 3 e.

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Presens Hecnerence l-6 217 840331 F

0 B

4 N.A.

HH HTEXCH Reactor power further reduced from Cont'd, 70% to 58% to remove the west main feed pump from service for tube leak check. One tube was plugged.

Re-actor power returned to 100% on 840401.

218 840403 F

0 B

4 N.A.

1U1 HTEXCH Reactor power reduced to 55% to re-move the west main feed pump from service to check the feed pump tur-bine condenser for tube leaks. One tube was plugged. Reactor power was returned to 100% on 840404.

219 840406 F

0 B

4 N.A.

HH HTEXCH Reactor power reduced to 56% to check the west main feed pump turbine con-

. denser for tube leaks. One tube was l

plugged. A power increase was started on 840407. At 77% additioral leakage was indicated in the west i

main f eed pump turbine condent.er and 1

2 3

4 I;: Forced Reason:

Method:

linhibit G Insiinctims S: Sched uleil A Equipmesis I ailuie (1 xplain) 1 Manual for Prepasanon of Data li-Mainienance or Test 2-Manual Scram.

Enisy Sheets (os I.icensee C-Refueling

.l-Automatic Scram.

Evens Repost (1.!!RI File INllRI G-D Regulaiosy Resisicsion 4-Oihes (Explain) 0161)

I! Operatos Isaining & license lixamination F-Adnunistsasive 5

G Opesasional I isos IExplaml

' Inhibit I-Same Somce 19/77) 11 Othes (Explain) l l

UNIT SHUTDOWNS AND POWER REDUCTIONS INSTRUCTIONS This report should desenbe all plant shutdowns during the in accordance with the table appearms on the report form.

report penod in addition. it should be the source of explan.

If category 4 must be used. supply brieicomments.

atton of significant dips in average power levels. Each signi.

ficant reduction in power level (greater than 20% reduction LICENSEE EVENT REPORT =. Reference the applicable in average daily power I, vel for the preceding 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ) reportable occurrence pertammg to the outage or power should be noted, even though the unit may not have been reduction. Enter the first four parts (event year, sequent:21 l

shut down completely. For such reductions in power level, report number, occurrence code and report type) of the tive the duration should be listed as zero, the method of reducucn part designation as descnbed in item 17 of Instruenons for should be listed as 4 (Other), and the Cause and Correcuve Preparation of Data Entry Sheets for Licensee Event Repcrt Action to Prevent Recurrence column should explain. The (LER) File (NUREG.0161). This information may not be Cause and Corrective Action to Prevent Recurrence column immediately evident for all such shutdowns, of course, smee should be used to provide any needed explanation to fully further investigation may be required to ascertam wncther or desenbe the circumstances of the outage or power reduction.

not a reportable occurrence was involved.) If the outage or power reduction will not result in a reportable occurrence.

NU5t BER. This column should indicate the sequential num.

the positive indication of this lack of correlation should be ber assigned to each shutdown or sigmncant reductionin power noted as not applicable (N/A).

for that calendar year. When a shutdown or sigmficant power SYSTE31 CODE. The system in which the outage or power reduction begins m one report period and ends m another.

gg gI an entry should be made for both report penods to be sure all shutdowns or sigmticant power reductions are reported.

Exhibit G. Instruenons for Preparation of Data Entry Sheets Until a unit has achieved its first power generation, no num-f r Licensee Event Report (!.ER) File (NUREG.0161).

ber should be assigned to each entry.

Systems that do not fit any ex:stmg code should ce des:gna.

ted XX. The code ZZ should be used for those events where DATE. This column should mdicate the date of the start a system is not applicable.

of each shutdown or sigmHcant power reduction. Report as year. month, and day. August 14.1977 would be reported COS!PONENT CODE. Select the most apprepnate eomponent as 770814 When a shutdown or sigmficant power reduction from Exhibit !. Instructions for Preparation of Data Entr>

begms m one report pened and ends m another, an entry should Sheets for Licensee Event Report (LER) File (NUREG.0161).

be made for both report periods to be sure all shutdowns using the followmg critierta:

or sigmilcant power reductions are reported.

TYPE. Use "F" or "S" to indicate either " Forced" or " Sche.

duled." respectively, for each shutdown or significant power B.

If not a component fat!ure. use the related component.

reduction. Forced shutdowns include those required to be e.g.. wrong valve operated through error: list valve as initiated by no later than the weekend following discovery component.

of an off. normal condition. It is recognized that some judg.

ment is required in categonzmg shutdowns in this way. In C. If a chain of failures occurs, the first component to mai.

general, a forced shutdown is one that would not have been function should be listed. The sequence of events. me!ud.

completed in the absence of the condition for which corrective ing the other components which fail. should be desenbed action was taken.

under the Cause and Cerrective Acuan to Prevent Recur.

rence column.

DURATION. Self. explanatory. When a shutdown extends Components that do not fit any existmg code should be de.

beyond the end of a report penod, count only the time to the signated XXXXXX. The code 777777 should be used for end at the report penod and pick up the ensumg down time events where a component designation is not applicable.

m the followmg report penods. Report duration of outages rounded to the nearest tenth of an hout to facilitate summation.

CAUSE & CORRECTIVE ACTION TO PREVENT RECUR.

The sum of the total outage hours plus the hours the genera.

RENCE. Use the column m a narrative fastuon to ampiify or tor was on line should equal the gross hours in the reportmg explam the circumstances of the shutcown orpower reduction.

penod.

The column should include the specific cause for each shut.

d wn r mmnesm pown huon ad th imndate and REASON. CateIonze b)- letter designation in accordance eontemolated long term correcuve action taken, if appropn.

tth the table appeatmg on the report form. If category H ate. This column should also be used for a desenption of the must be used suppi) briet eumments.

maior safety.related corrective mamtenance performed dunne the outsar or power reduction mcluding an identtilcation of METHOD OF SHUTTING DOWN THE REACTOR OR the entteal path actmty and a report of any smgle release ef REDUCING POWER. Categorize bv number designation radioactmty or smgle radiation exposure spectriestly atsoet.

INote that this dift'ers from the Edi.on Electne Insutute ated with the outage which accounts for more than 10 percent tEEll detimtions of " Forced Partial Outsee" and " Sche.

of the allowsole annual values.

,2uled Partial Outage." For these terms. FEl uses a shange of For long textual reports eontmue narrative on separate paper 30 SIW as the creak pomt. Fur larger power reactors. 30 StW and referense the shutdown or power redustiun im tm>

s tua small a.hange in wariant espianation, narrative.

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DOCKET NO. 50-315 UNITSilUTi> OWNS AND POWER REDUCDONS D.C. Cook-- Unit l' UNIT N AME DATE 5-7-84 COMPLETED hY B.A. Svensson REPORT MON Hf APRIL, 1984 616/463-5901 TELEPig v.

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219 reactor power was again reduced to Cont'd 55%. One additional tube was plug-ged. A steam side inspection did not reveal any problems that could be the cause for the high tube failur e rate. Reactor power was returned to 100% on 840408.

220 840409 F

78.7 A

1 84-004 BA.

SHV On 840406 at 0311 hours0.0036 days 0.0864 hours 5.142196e-4 weeks 1.183355e-4 months , the turbine driven auxiliary feed pump was de-clared inoperable due to the inabil-ity to trip the turbine trip'and throttle valve. Repairs could not be accomplished within the 72-hours allowed by Tech. Spec. 3.7.1.2.

The Unit was removed from service on 840409 and placed in Hot Shutdown, Mode 4, as required by Tech. Spec.

3.7.1.2.

The valve was repaired and the Unit returned to service on 840412.

100% reactor power was 1

2 3

4 1:: Fosted Reason:

Meitiod:

Exinliit G-lustsucti wis S: Stliedulcal A Espiipment Fashae(Explain) 1 -Manual for Picpasalion ol' Data

11. Maintenance of Test 2 Mannat Scram.

Entsy Slicens fos 1.icensee C Hefueling 3-Automatic Scsam.

Evens Reposi ll.l!H) File INilRI G-D Regulaiosy Resisiction 4.Othes (Explain) 0161)

IM)pesalor Daining & IJcenw l xamination 1;-Administsative 5

G Opesasiimal Essos liixplaint lisinbit I - Same Somce 19/17) 11-01hes llisplaini

e UNIT SHUTDOWNS AND POWER REDUCTIONS INSTRUCTIONS This report should descrte all plant shutdowns during the a accordance with the table appearing on the report form.

report penod. In addition. it should be the source of explan.

If category 4 must be used. supply brief comments.

atton of sigmficant dips m aserage power levels. Each signi.

ricant reduction in power level (greater than 20% reduction LICENSEE EVENT REPORT :. Reference the applicable in average daily power level for the preceding 24 hnurs) reportable occurrence pertamtng to the outage or power should be noted. even though the umt may not have been reduction. Enter the first four parts (event year sequential l

shut down completely. For such reductions in power level, report number, occurrence code and report type) of the rive the duration should be listed as zero, the method of reduction part designation as descnbed in item 17 of Instructions for should be listed as 4 (Other). and the Cause and Correcuve Preparst'on of Data Entry Sheets for Licensee Event Report Action to Prevent Recurrence column should explain. The (LER) File (NUREG.0161). This information may not be Cause and Corrective Action to Prevent Recurrence column immediately evident for all such shutdowns, of course, since should be used to provide any needed explanation to fully turther mvestigation may be required to ascertam whether or describe the circur-stances of the outage or power reduction.

not 3 feportable occurrence was involved.) If the outage or power reduction wtll not result in a reportable occurrence.

NU5tBER. This column should indicate the sequential num.

the posttive indication of this lack of correlation should be ber assigned to each shutdown or sigmilcant redactionin power n ted as not applicable (N/A).

for that calendar year. When a shutdown or significar.t power reduenon begms in one report pened and ends in another, SYSTE31 CODE. The system in which the outage or power reduction onginated sh' uld be noted by the two digit code of

~

o an entry should be made for both report penods to be sure all shutdowns or siamilcant power reductions are reported.

Exnibit G Instrucuans for Preparation of Data Entry Sn.eets Untt! 2 urtit has sch'ieved its first power generation, no num.

f r Licensee Event Report (LER) File (NUREC4161).

ber should be assigned to each entry.

Systems that do not fit any existmg code should be designa.

ted XX. The code ZZ should be used for those events where DATE. This column should indicate the date of the start a system is not applicable, of each shutdown or signiricant power reduction. Report as year. mcnth, and day. August 14.1977 would be reported COSIPONENT CODE. Select the most appropriate component as 770814. When a shutdown or significant power reduction from ExhWit ! Instrucuons for Preparation of Data Entr) begms m one report penod and ends in another, an entry should Sheets for Licensee Event Report (LER) File (NUREG4161L be made for both report periods to be sure all shutdowns usmg the followmg cntiena:

or sigmricant power reductions are reported.

TYPE. Use "F" or "S" to indicate either " Forced" or " Sche.

duled." respectively, for each shutdown or significant power B.

If not a component failure, use the related component:

reducuan. Forced shutdowns include those required to be e.g., wrong valve operated through erron list valve as initiated by no later (nan the weekend following discovery component.

of an off. normal condition. It is recognized that some judg.

ment is required in categonzmg shutdowns in this way. In C.

If a cham of failures occurs, the first component to mai.

general a forced shutdown is one that would not have been funcuon should be listed. The sequence of events. melud.

completed in the absence of the condition for which corrective ing the other components which fail, should be desenbed action was taken.

under the Cause and Corrective Acuon to Prevent Recur.

tence column.

DURATION. Self-explanatory. When a shutdown extends beyond the end of a report penod, count only the time to the Components that do not tit any existmg code should be de-signated XXXXXX. The code 777777 should be used for end of the report penod and pick up the ensumg down time in the following report penods. Report duratson of outages events where a component designation is not applicable.

rounded to the nearest tenth of an hour to facilitate summation.

CAUSE & CORRECTIVE ACTION TO PREVENT RECUR.

The sum of the total outage hours plus the hours the genera.

tot was on line should equal the gross hours in the reportmg RENCE. Use the column in a narrative fashion to ampitfy or penod.

explam the circumstances of the shutdown or power reducuan.

The column should melude the specitic cause for each shut.

wn r ugn ant p wn re cd n and the immdate am!

REASON. CateIonze by tetter deugnation in accordance with the table appearing on the report form. If category H contemolated long term corrective action taken if appropn.

must be used. supply enef eomments.

ate. This colurnn should also be used for a desertption of the maior safety.related corrective maintenance performed dunna the utage r p wer reduction including an identitication ot METHOD OF SHUTTING DOWN THE REACTOR OR REDUCING POWER. Categonee bv number deugnation the entreal path aetmty and a report of any smgle release et radioaettvity or smgfe radiation exposure spectrically asscet.

INote that this differs trom the Edison Ele.tne Institute ated with the outage which accounts for more than 10 percent IEEI) derimttons of " Forced Partial Outage" and " Sche-oi th: 211owable annual vslues.

Juled Partial Outage." For these ternh. hEl uses 4 hange at For lung textual reports contmue narrattve on separate paper 30 Slw as the break pomt. For larger power reactors.30 5tw and rererense the shutdown or power redu nun im imi

s t. a smail a hange to wanant espiananon.

narrative.

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7 50-315 DOCKET NO.

UNITSilUTDOWNS AND POWER REIRJCTIONS UNIT NAME D.C. Cook - Unit,l' IDATE 5-7-84

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7 REPORTMONTil' APk 1%4,I COMPLfTED BY. _II. A. Svensson j.

TEl)TilONEL-oG/465-5901 TAGE<?! of 3

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6 220 reached on 840413.,

Cont'd 221 840418 F

0 F

4 N.A.

ZZ ZZZZZZ Reactor power reduced to 80% as re-quired by Plant Secondary Chemistry Specifications due to high dissolved oxygen in the condensate. Reactor power was returned to 100% on 840419.

222

' 840427 F

0 F

4 N.A.

ZZ ZZZZZZ Reactor power was again reducad to 80% due to high dissolved oxygen in the condensate._ Reactor pcwer re-mained,at 80% at the end of the month The ceurce of air inleakage has been

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isolated and reactor power was re-turned to 100% on 840502.

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12 Ienced Reason:

Method:

Eminbis G - Instsucti wis S: Stheduled A E43tispmer.: Fathue (Explain)

I-Maimal los Psepasalism ul Data u Maintenance oi Test 2 Manual Scram.

Entsy Shecis fin 1.icensee C Refuchng

.1 Antomatic Stsam.

livent Repos (1.ERl1:de iNilRl'G-

1) Regulaiosy Restsiclion 4 Othes (Explain) 0161) 1 Opesato l'saining & l.icense fixamination I:-Admimstsative 5

G Operasional tissus flixplam n lishibit I - Same Somce 19/77)

!! Other (Explain)

1 UNIT SHUTDOWNS AND POWER REDUCTIONS INSTRUCTIONS This report should describe all plant shutdowns during the in accordance with the table appearing on the report form.

report penod. In addition it should be the source of explan.

If category 4 must be used. supply brief comments.

ation of significant dips m average power levels. Each signi.

4~

s ficant reduction m power level (greater than 20% reduction LICENSEE EVENT REPORT =. Reference the applicable in average daily power level for the preceding 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ) reportaole occurrence pertaming to the outage or power should be noted, even thouA the umt may not have been reduction. Enter the first four parts (event year, sequennal l

- shut down completely. For such reductions in power level, report number, occurrence code and report type) of the tive y

the duration should be listed as zero, the method of reduction part designation as described in item 17 of instructions for f should be listed as 4 (Other). and the Cause and Correcuve Preparation of Data Entry Sheets for Licensee Event Report Action to Prevent Recurrence column should, olain. The (LER) File (NUREG.0161). This information may not be Cause and Correcuve Action to Prevent Recurre.c:e column immediately evident for all such shutdowns, of course, smce

should be used to provide any needed explanation to fully further investigation may be required to ascertam whether or describe the circumstances of the outage or power reduction.

not a reportable occurrence was involved.) If the outace or power reduction will not result in a reportable occurrence.

J NISIBER. This column should indicate the sequential num.

the positive indication of this lack of correlation should b-ber.ssigned to each shutdoen or significant reductionin power noted as not applicable (N/A).

for that calendar year. When a shutdown or significant power SYSTE11 CODE. The system in which the outage or power reduction begins in one report period and ends in another.

-i,

an entry should be made for both report penods to be sure reduction onginated sh'ould be noted by the tw'o diga code of i ill shutdowns or sigmncant power reductions are reported.

Exhibit G - Instructions for Preparation of Data Entry Sheets y((,

Until a unit has achieved its first power generation, no num-f r Licensee Event Report (LER) File (NUREG4161).

ber should be assigned to each entry.

Systems that do not fit any existmg code should be designs.

ted XX. The code ZZ should be used for those events where DATE. This column should indicate the date of the start a system is not applicable.

of each shutdown or signidcant power reduction. Report as year, month. and day. August 14.1977 would be reported COSIPONENT CODE. Select the most appropriate component y

as 770814 When a shutdown or significant power reduction from Exhibit !. Instructions for Preparation of Data Entry z

begms in one report penod and ends in another, an entry should Sheets for Licensee Event Report (LER) File (NUREG4161).

'f be made for both report periods to be sure all shutdowns using the following entieria:

F.

er significant power reductions are reported.

' TYPE.~ Use "F" or "S" to indicate either " Forced" or " Sche.

duled." respectively. for each shutdown or significant power B.

If not a component failure. use the related component:

'reducuon. Forced shutdowns include those required to be e.g.. wrong valve operated through error: list valve as initiated by no later than the weekend following discovery component.

p, t f.

of an off-normal condition. It is recognized that some judg.

s>.

ment is regtured in categorizmg shutdowns in this way. In C.

If a cham of failures occurs. the first component to mai.

general a forced shutdown is one that would not have been function should be listed. The sequence of events, me!ud.

completed in the absence of the condition for which corrective ing the other components which fail, should be desenbed action was taken.

under the Cause and Corrective Action to Prevent Recur.

rence column.

DURATION. Self. explanatory. When a shutdown extends Components that do not fit any existmg code should be de.

beyond the end or a report penod. count only the time to the g

signated XXUvX. The code 777777 should be used for

'4 end at the report penod and pick up the ensumg down time 2

events where a component designation is not applicaole.

in the following report periods. Report duration of outages

<j r6unded to the nearest tenth of an hour to facilitate summation.

C: 0 % i fORRECTIVE ACTION TO PREVENT RECUR.

The sum of the total outage hours plus the hours the genera.

g ;

t. e the column in,arrative fashzon to ampitfy or tor was on line should equal the gross hours in the reportt" q.? the otrcumstances of the salutdown orpower reduction.

j g (c ! penod.

T'

,en should include the specific cause for each shut.

.i/ ~ I REASON. Categonze by letter deugnation in accordare~

- ' "E"

"' E * * '

"#" **I N I**#*** *"d

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co.itemeuted long term correenve action taxen. If appropn.

s

.,q with the table appearing un the report form. If category H ate. This column should also be used for a desenption of the y

g must be : sed. supply bnet eumments.

ma;or safety.related corrective mamtenance performed durma i)N.

.\\tETNOD OF SHUTTING DOWN THE REACTOR OR the outage or power reduction including an identification ot; REDUCING POWER. Categonze by number designation the entteal path actmty and a report of any smgle release et L

radioactmty or smgle radiatwr. exposure spee, cally assoe -

h INote that this differs trom the Edison Electne Institute ated with the outage which awnts for mere t..,10 percent IEEI) derimtions of " Forced Partial Outage" and " Sche, of the allowab;e annual values.

p ', / uled Partial Outap." For these tenna.1 El uses a shange of

4*

d For long textual reports contmue narrative on separate paper 10 alW as the break mmt. For larger power reactors. 30 5tW and referen e the shutdow n or power redustion im tm>

i js im small a change to warrant oplanauon.

narranve.

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Docket No.:

50-315 Unit Namos D. C. Cook Unit 1 Completed By:

G. J.

Peak Telephone:

(616) 465-5901 Date:

5/7/84 Page:

1 of 2 MONTHLY OPERATING ACTIVITIES - APRIL 1984 Highlights:

The Unit entered the reporting period in Mode 1 with the reactor at 58% of rated thermal power due to the West Main Feedpump being out'of service for a condenser tube leak check.

The Unit had to be removed from service on 4/9/84 due to an inoperable turbine driven auxiliary feedwater pump.

The cause of the inoperability was a trip and throttle valve which would not trip the turbine.

The turbine driven auxiliary feedwater pump was subsequently declared operable on 4/11/84 and the Unit was returned to service on 4/12/84.

Major power reductions occurred to remove the West Main Feedpump from service for condenser tube leak checks, and due to Unit exceeding secondary side chemistry specifications.

As the

'renorting period came to an end, the Unit was operating at 80% of rated thermal power due to secondary side oxygen concentration being out of specification.

Total electrical generation for the month was 608,060 MWH.

Summary:

4/1/84 Power was reduced to 58% at 0000 hours0 days 0 hours 0 weeks 0 months to remove the West Main Feedpump from service for a condenser tube leak check.

Power was returned to 100% at 2345 hours0.0271 days 0.651 hours 0.00388 weeks 8.922725e-4 months .

4/3/84 Power was reduced to 55% at 1725 hours0.02 days 0.479 hours 0.00285 weeks 6.563625e-4 months to remove the West Main Feedpump from service for a condenser tube leak check.

4/4/84 Power.was returned to 100% at 2030 hours0.0235 days 0.564 hours 0.00336 weeks 7.72415e-4 months .

4/6/84 Power was reduced to 56% at 1855 hours0.0215 days 0.515 hours 0.00307 weeks 7.058275e-4 months to remove the West Main Feedpump from service for a condenser tube leak check.

The turbine driven auxiliary feedwater pump was declared inoperable at 0311 hours0.0036 days 0.0864 hours 5.142196e-4 weeks 1.183355e-4 months because the turbine could not be tripped by use of the trip push button.

4/8/84 Power was returned to 100% at 1326 hours0.0153 days 0.368 hours 0.00219 weeks 5.04543e-4 months .

4/9/84 The Unit was removed from service due to an inoperable turbine driven auxiliary feedwater pump.

The Main Turbine was tripped at 0700 hours0.0081 days 0.194 hours 0.00116 weeks 2.6635e-4 months .

The reactor trip breakers were opened at 0728 hours0.00843 days 0.202 hours 0.0012 weeks 2.77004e-4 months .

Mode 4 was entered at 1455 hours0.0168 days 0.404 hours 0.00241 weeks 5.536275e-4 months .

4/10/84 A heat up of the Reactor Coolant System began at 0240 hours0.00278 days 0.0667 hours 3.968254e-4 weeks 9.132e-5 months and Mode 3 was entered at 0312 hours0.00361 days 0.0867 hours 5.15873e-4 weeks 1.18716e-4 months .

4/11/84 The turbine driven auxiliary feedwater pump was declared operable at 0530 hours0.00613 days 0.147 hours 8.763227e-4 weeks 2.01665e-4 months .

Docket No.:

50-315 Unit Namer-D. C. Cook Unit 1 Completed By:

G. J. Peak Telephone:

(616) 465-5901 Date:

5/7/84 Page:

2 of 2 4/12/84 The reactor was critical at.0443 hours0.00513 days 0.123 hours 7.324735e-4 weeks 1.685615e-4 months .

Mode 1 was entered

-at 1151 hours0.0133 days 0.32 hours 0.0019 weeks 4.379555e-4 months .

The Main Turbine was rolled at 1241 hours0.0144 days 0.345 hours 0.00205 weeks 4.722005e-4 months .

The Main Generatcr was paralleled-at 1345 hours0.0156 days 0.374 hours 0.00222 weeks 5.117725e-4 months .

4/19/84

- Power was reduced to 80% at 0300' hours due to secondary side oxygen concentration being out of specification.

The Unit was returned to 100% power at 2205 hours0.0255 days 0.613 hours 0.00365 weeks 8.390025e-4 months .

4/25/84 A power reduction to 80% started at 2025 hours0.0234 days 0.563 hours 0.00335 weeks 7.705125e-4 months due to

- secondary side oxygen concentration being out of specification.

4/26/84 Secondary. side oxygen concentration was in specification at 0300 hours0.00347 days 0.0833 hours 4.960317e-4 weeks 1.1415e-4 months and the power' reduction stopped at 81.5%.

Power was returned to 100% at 1000 hours0.0116 days 0.278 hours 0.00165 weeks 3.805e-4 months .

4/27/84 Power was reduced to 80% at 1030 hours0.0119 days 0.286 hours 0.0017 weeks 3.91915e-4 months due to secondary side oxygen concentration being out of specification.

The Control Room Cable Vault-Halon System remains inoperable as of 1400 hour0.0162 days 0.389 hours 0.00231 weeks 5.327e-4 months s-on 4/5/83.

The backup CO System for-the Control Room 2

Cable Vault remains operable.

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4 DOCKET NO.

50 - 315-UNIT NAME D. C. Cook - Unit No. 1 DATE 5-7-84 COMPLETED BY B. A. Svensson TELEPHONE (616) 465-5901 PAGE 1 of 1 MAJOR SAFETY-RELATED MAINTENANCE APRIL, 1984 M-1 A new gasket was installed to repair a leaking orifice flange located between the cold leg RTD manifold and valve,

RC-180L4.

M-2

-The Unit 1 turbine driven auxiliary feed pump trip and throttle valve would not trip closed. The valve was dis-

. assembled and a new plug and pilot valve / stem were instal-led. The stem-pilot screw was adjusted. Installed a union on the lower leakoff line and capped both ends of the lower bonnet leakoff line. Adjusted, cleaned and lubricated the valve operator. Functional testing was performed following repairs and the valve was returned to service.

C&I-l Emergency ' diesel generator 1CD pneumatic tachometer circuitry failed. A replacement bridge and potentiometer net';ork were installed. The tach was adjusted to read 514 RPM at syn-chronous speed during a test run of the generator.

C&I-2 Source range nuclear instrument channel N32 indicator was at 10 CPS with the channel de-energized. The triaxial con-nector cable was found to have " ground loops" between its shields. When a new cable was installed, N32 reading re-turned to zero.

L '*

4. i INOMM & MXHIGAN EMTRM10WANX ystens Donsid C. Cook Nuclear Plant P.O. Box 458, Bndgman, Mchgan 49106 May 7,-1984 Director, Office Of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C.

20555

- Gentlemen:

Pursuant to the requirements of Donald C. Cook Nuclear Plant Unit 1 Technical Specification 6.9.1.6, the attached Monthly Operating Report for the Month of April, 1984 is submitted.

Sincerely,

)

1.

. Smith, Plant Manager WGS:ab Attachments cc:

J. E. Dolan M. P. Alexich R. W. Jurgensen NRC Region III E. R. Swanson R. O. Bruggee (NSAC)

R. C. Callen S. J.111erzwa R. F. Kroeger B. H. Bennett J. D. fluebner J. H. bennigan A. F. Kozlowski R. F. IIering.

J. F. Stietzel PNSRC File INP0 Records Center 9

4 o

ML20091K383

Text

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