Text

Monthly Operating Rept for Aug 1985
	ML20135G249
Person / Time
Site:	Duane Arnold
Issue date:	08/31/1985
From:	Mineck D, Bernard Thomas; IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	; NRC OFFICE OF ADMINISTRATION (ADM), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
	DAEC-85-0780, DAEC-85-780, NUDOCS 8509180336
	Download: ML20135G249 (16)
	v • d • e

'

OPERATING DATA REPORT 1

DOCKET NO. 050-0331 OATE 09-15-85 i

COMPLETED BY Bradford Thomas

}

TELEPHONE 319-851-7339 OPERATlNG $TATUS Notes 1

1. Unit Name Duane Arnold Enoray Center

2. Reporting Period August. 1985

3. Licensed Thermal Power (MWt):

1658

4. Nameplate Rating (Gross MWe):

565 (Turbine)

5. Design Electrical Rating (Not MWe):

5 38

6. Maximum Dependable Capacity (Gross We):

54 5

7. Maximum Dependable Capacity (Net MWe):

515

[

8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since the Last Report, Give Reasons:

i l!

9. Power Level to Which Restricted, if Any (Not MWe):

10. Reasons For Restrictions, if Anyt j

i f

This Month Yr-to-Date Cumulative l

11. Hours in Reporting Period 744.0 5831.0 92759.0

12. Number of Hours Reactor was Critical 744.0 1804.2 64392.9 i

13. Reactor Reserve Shutdown Hours 0

0 150.3

14. Hours Generator On-Line 744.0 1782.8 62630.5

15. Unit Reserve Shutdown Hours 0

0 0

16. Gross Thermal Energy Generated (MWH) 1082280 2306724 78766659 l

17. Gross Electrical Energy Generated (MWH) 357756 761879 26349233 I

18. Net Electrical Energy Generated (MWH) 336172 712507 24668658

]

19. Unit Service Factor 100.0 30.6 67.5

{

20. Unit Availability Factor 100.0 30.6 67.5

21. Unit Capacity Factor (Using MCC Net) 87.7 23.7 51.6

22. Unit Capacity Factor (Using DER Net) 84.0 22.7 49.4

23. Unit Forced Outage Rate 0

0 16.6

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

)

None i

25. If Shut Down At End Of Report Period, Estimated Date of Startup N/A a

q

_~

.m l

AVERAGE DAILY UNIT POWER LEVEL 1

DOCKET NO. 050-0331 UNIT Duane Arnold Energy Center DATE 09-15-85 1

COMPLETED BY Bradford Thomas TELEPHONE 319-851-7339 4

MONTH A uau st, 1985 1

DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) l 466 17 447 3

484 18 343 3

280 19 446 4

457 20 498 1

9 39 3 21 4 90 6

467 22 465_

7 487 23 466 8

485 24 458 9

460 25 454 10 495 26 463 11 46 3 27 466 12 455 28 456 13 448 29 450 14 422 30 447 19 493 31 4 34

[

4 16 464 I

i INSTRUCTIONS I

On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to-l l

9he nearest whole megawatt.

(9/77) i 1

I,

+

h i

i l

i 1

i t

l l

E

- - ~ _...

(

I

. 0

/

S F N

7 2

1 o

7 S F

)

~

co h r ec d e 0

0 u d 8

8 D

/

a l

0 t

e 1

d 8

3 e

/

8 8

5 5

2 HG F E DCB A R

- - - - - - - - e e

hCQ OO A O R R M E a S

F 3J tp d p e eaq s h o meg f i u o i r u u n in or ra n a l

e t p :

e m

( t i t a l

Ei s o t in e xo t r on a n 5U# roc p nr rg n t l aa Ty c

0 0

bO3Lnn al t r e F u

U i

i a R a

N nE v ie oi I

) r e n s r

l T

r it u

o n r T r R

S e e N

r g

E H

i

$OnOc t*

0 A

P U

(

c s

(

E

& t t E O

T x

i x

R D

p L o p

T O

l i n l

W a

c a

M N

2 mot Oo.t O

S e

i i

n n

n N

T A

)

s

)

^.5WvO2C H

N e

1 1

D L.CL03aL Ex m

P J

E gO4e=Oc A

O a

m u

W i

g E

n u

R a

s t

t R

i R

L E

D o

e i

n p E c 1

U o v e 9

C de n

8 T

n s 5

I t e O

e N

S 3

4 3 2 1

M yyn*QE4 e

- - - - e S

J OA M M t J

UOVC t u a a h J

h t n n o e ou u d r ma a:

8 gOcQc#n

(

a l

l P

J n

C E t uOtG o

x i S S

J p cc P

m D

l r

Tp Uo el n c a S a l

e ik i c.m n r et t e

)

a p e t

P P

h d D N

.m

- oo o

a a N ro mt o w i of w n b t e.o m

d e n

e ey e r

ir f r 5

4 p

mee 3

B 0

D 0

a r up e r 1

r 9

u 5

E 0 E E f E t e ma d e 9

a a

0 1

v n ox t d i w d d

1 n

x h

6 e t r h eu f r a u C

8 f

5 e

0 i

1 n r i

r c l

t c a

5 o

3 b

)

ty Pb n e ol e e u

1 r

8 A

3 i

r i d

w er d s

d 5

r 1

t R S e t c

a e

7 n

e h p h t d kp t 3

T o

1 p e aG a o r

u o 3

h l

oe r -

n a im 9

o d

S r t aI g p inp p m

a t s t n ee n

e a

E m

i s r

a f r s

n e

(

f ot m

l r m e

L o n r i

i f o i r

S E r u

t n em t g

o R

oc ee y

u

)

L f t c

d s r o

w e e C

r i

i c

F c Do n

a r m e

e i e a n t

t v o n

l n t s r

eiv t

es a o

r c a e

e l

r e

(

N U

R E

G

Docket No. 050-0331 Unit Name Duane Arnold Ennegy Conter Date 09-15-85 MAJOR / SAFETY RELATED MAINTENANCE

. Completed by Bradf ord Thomas Telephone 319-851-7339 DATE SYSTEM COMPONENT DESCRIPTION 08/OI/85 Primary Containment Drywell egalpment sump Repaired air supply to discharge control valve 09/02/85 Reactor Core isolation Cooling RCIC Static inverter Replaced RCIC Inverter and cleaned contacts IRCIC) on power failure relay 38/03/85 Feedwater Feedwater minimum flow line Repaired leak in a feedwater minimum flow drain 1Ine 08/09/85 Primary Containment Drywell equipment sump timer Adjusted and cleaned contacts on equipment sump timer 08/12/85 Fira Main Main fire header line Repaired leak in fire header line 08/26/85 Residual Heat Removal Service RHRSW pump check valve Repaired check valve Water (RHRSW) o O

O 9

e.

-s

' Docket No. 050-0331 Unit Name Duane Arnold Energy Center Date 09-15-85 Completed by Bradford Thomas Telephone 319-831-7339 REFUEllNG INFORMATION 1

Name of facility.

A.

Duane Arnold' Energy Center 2.

Scheduled date for next refueling shutdown.

l A.

1987 1

Scheduled date for_ restart following refueling.

A.

1987-4 Will refueling or resumption of operation thereafter require a technical specification change or other license amendment?

A.

None currently identitled 5.

Scheduled da+e(s) for sobmitting proposed licensing action and supporting information.

A.

None currently Identlfled 6

Important licensing considerations associated with refueling, e.g.,

new or different fuel design or supplier, unreviewed design or performance analysis methods, significant changes in fuel design, new operating procedures.

No.

7 The number of fuel assemblies (a) In the core and (b) in the spent fuel storage pool.

'A.

a) 368 b) 696 8

The present licensed spent. fuel pool storage capacity;and tne size'of any increase in licensed storage capacity that has been ~ requested or is planned,.In number of fuel assemblies.

A.

20$0 9

The projected date of the last refueling that can be discharged to the spent fuel pool assuming the present licensed capacity.

A A.

1998 I

i

)

i

Dockot No. 050-0331 Unit Name Duane Arnold Energy Center Date 09-15-G5 Completed by Bradf ord Thomas Telephone 319-851-7339 NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE 08/01/85 At the beginning of the month the Duane Arnold Energy Center was producing power at 495 MWe (gross).

At 0846 hours0.00979 days 0.235 hours 0.0014 weeks 3.21903e-4 months a 7 day LCO was entered due to an air supply leak on a drywell equipment sump discharge control valve.

Repairs were made by 0936 hours0.0108 days 0.26 hours 0.00155 weeks 3.56148e-4 months and' the LCO cancel l e d.

08/02/85 At 1108 hours0.0128 days 0.308 hours 0.00183 weeks 4.21594e-4 months a 7 day LCO was entered when the Reactor Core isolation Cooling (RCIC) was declared inoperable due to a faulty static inverter.

The static inverter was replaced and the system was declared operable at 1825 hours0.0211 days 0.507 hours 0.00302 weeks 6.944125e-4 months thus cancellfrq the 7 day LCO.

(LER 85-031)

At 2154 hours0.0249 days 0.598 hours 0.00356 weeks 8.19597e-4 months reactor power was reduced to approximately 60$ to secure a reactor feedwater pump in order to make repairs on a leaking drain line.

The pump was secured at 0208 hours0.00241 days 0.0578 hours 3.439153e-4 weeks 7.9144e-5 months on 08/03/85 and repairs were made by 1350 hours0.0156 days 0.375 hours 0.00223 weeks 5.13675e-4 months .

At 2400 hours0.0278 days 0.667 hours 0.00397 weeks 9.132e-4 months the plant entered a region of operation in which the load line was greater than 80% of rated power with core flow less than 45% of full i

flow.

A required surveillance was missed during the first two hours of operation.

(LER 85-032)-

08/04/85 At 2131 hours0.0247 days 0.592 hours 0.00352 weeks 8.108455e-4 months the

'B' Emergency Diesel Generator (EDG) had successfully completed its operability test.

A fuel sample taken after the test was being analyzed. At 0753 hours0.00872 days 0.209 hours 0.00125 weeks 2.865165e-4 months on 08/05/85 the

'A' EDG was removed from service, entering a 7 day LCO.

The fuel sample tests completed on

'B' EDG were slightly above Technical Specification requirements for sediment levels, thus entering a 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months LCO as both diesels were Inoperable. At 1918 hours0.0222 days 0.533 hours 0.00317 weeks 7.29799e-4 months the

'A' EDG was returned to service ending the 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months LCO.

The

'B' EDG was declared operable on 08/06/85 at 0953 hours0.011 days 0.265 hours 0.00158 weeks 3.626165e-4 months cancelling the 7 day LCO.

(LER 85-033) 08/09/85 At 1700 hours0.0197 days 0.472 hours 0.00281 weeks 6.4685e-4 months , the drywell. equipment sump timer failed during surveillance testing.

A 7 day LCO was entered.

Repairs were completed at 2053 hours0.0238 days 0.57 hours 0.00339 weeks 7.811665e-4 months thus ending the.LCO.

08/12/85 At 1800 hours0.0208 days 0.5 hours 0.00298 weeks 6.849e-4 months during a fire pump operability test a leak was found in a temporary section of the main _ fire header.

The leaking section was isolated I,

In' preparation for repales.

Isolating the leak also isolated all reactor building fire stations.

Fire hose was run between the reactor building stations and the standby transformer deluge water system, thus supplying water from an operable section of the fire main to the reactor building fire stations. A roving fire watch was initiated at 1831 hours0.0212 days 0.509 hours 0.00303 weeks 6.966955e-4 months to compensate for the temporary loss of hose stations. Repairs were made and the system was returned to normal service on 08/15/85.

(LER 85-029) c

-+-, - -

g, 7.

Docket No. 050-0331 Unit Name Duane Arnold Energy Center Date 09-15-85 Completed by Bradf ord Thomas i

Telephone 319-851-7339 NARRATI VE

SUMMARY

OF OPERATING EXPERIENCE (Continued) 08/16/85 At 0035 hours4.050926e-4 days 0.00972 hours 5.787037e-5 weeks 1.33175e-5 months , the reactor water sample point was shifted from the Reactor 4

Water Cleanup (RWCU) system to the *ecirculation loop sample point in preparation for removing the RWCU system from service for planned maintenance.

At 1019 hours0.0118 days 0.283 hours 0.00168 weeks 3.877295e-4 months , it was found that there was no flow at the recirculation sample line due to a closed valve.

The valve was opened at 1019 hours0.0118 days 0.283 hours 0.00168 weeks 3.877295e-4 months , thus establishing sample flow and restoring conductivity

. monitoring.

It was noted that reactor water conductivity was acceptable both before and after this event.

The two other sample points remained i

operable throughout the event.

At 0348 hours0.00403 days 0.0967 hours 5.753968e-4 weeks 1.32414e-4 months , RWCU was removed from service for planned maintenance.

The system was returned to service at 2316 hours0.0268 days 0.643 hours 0.00383 weeks 8.81238e-4 months .

08/20/85-At 0310 hours0.00359 days 0.0861 hours 5.125661e-4 weeks 1.17955e-4 months , the

'A' Residual Heat Removal Service Water (RHRSW) pump discharge check valve stuck open during surveillance testing.

The pump was isolated from the system and a 30 day LCO commenced. Repairs were made and the pump returned to service by 2100 hours0.0243 days 0.583 hours 0.00347 weeks 7.9905e-4 months on 08/26/85 thus ending the LCO.

]

08/22/85 At 1350 hours0.0156 days 0.375 hours 0.00223 weeks 5.13675e-4 months , both Emergency Diesel Generators (EDG) were declared technically Inoperable when a design deficiency was noted that could Impact j

EDG operation during partial loss of offsite power concurrent with a loss of l

coolant accident.

This placed the plant in a 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months LCO.

A. system

}

alteration-was completed at 2240 hours0.0259 days 0.622 hours 0.0037 weeks 8.5232e-4 months to alleviate the condition, ending j

the LCO.

l (LER 85-036 6

pending) 08/30/85 At 0442 hours0.00512 days 0.123 hours 7.308201e-4 weeks 1.68181e-4 months the electric fire pump was removed from service for general d

maintenance, entering a 7 day LCO.

Packing was repaired and the pump was returned to service at 1031 hours0.0119 days 0.286 hours 0.0017 weeks 3.922955e-4 months on 08/31/85 ending the LCO.

j 08/31/85 Normal power operation at 434 MWe (gross) w i t h' power levels limited.due to low condenser vacuum' pressure.

l

= ---

L

G-4 September 15, 1985 T0:

8. Peterson J. Rehnstrom R. McGaugby/ Ward H. Rehrauer E. Matthews W. Bryant R. Salmon D. Wilson R. Hannen C. Mick D. Vest (3 copies)

E. Root P. Seckman W. Nodean D. Poetting FROM:

D. Mineck Plant Superintendent - Nuclear FILE: A-118d, TE-5 Please find attached one copy of the Monthly Operating Report for August, 1985, that has been transmitted to the NRC.

kp*

OPERATING DATA REPORT DOCKET NO. 050-0331 DATE 09-15-85 COMPLETED BY Brad ford Thomas TELEPHONE 319-851-7339 OPERATING STATUS Notes I. Unit Name Duane Arnold Energy Center

2. Reporting Period August, 1985

3. Licensed Thermal Power (Mwt):

1658

4. Nameplate Rattnq (Grcss Rfe):

565 (Turbine)

5. Design Electrical Rating (Not Mwe):

5 38

6. Maximum Dependable Capa:lty (Gross We):

545

7. Maximum Dependable Capacity (Not Mwe):

515

6. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since the Last Report, Give Reasons:

9. Power Level to which Restricted, if Any (Net MWe):

10. Reasons For Restrictions, if Any:

1 This Month Yr-to-Date Cumulative

11. Hours in Reporting Period 744.0 5831.0 92759.0

12. Number of Hours Reactor was Critical 744.0 1804.2 64392.9

13. Reactor Reserve Shutdown Hours 0

0 150.3

14. Hours Generator On-Line 744.0 1782.8 62630.5

15. Unit Reserve Shutdown Hours 0

0 0

16. Gross Thermal Energy Generated (WH) 1082280 2306724 78766659

17. Gross Electrical Energy Genereted (MwH) 357756 761879 26349233

18. Not Electrical Energy Generated (MwH) 336172 712507 24668658

19. Unit Service Factor 100.0 30.6 67.5

20. Unit Availability Factor 100.0 30.6 67.5

21. Unit Capacity Factor (Using MOC Net) 87.7 23.7 51.6

22. Unit Capacity Factor (Using DER Net) 84.0 22.7 49.4

23. Unit Forced Outage Rate 0

0 16.6

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

None

25. If Shut Down At End Of Report Period Estimated Date of Startup:

N/A (9/77)

.r

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 050-0331 LNIT Duane Arnold Energy Center DATE 09-15-85 COMPLETED BY Bradford Thomas TELEPHONE 319-851-7339 MONTH August, 1985 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL -

(MWe-Net)

(MWe-Net) 1 466 17 447 2

484 18 343 3

280 19 446 4

457 20 498 5

393 21 4 90 1

6 467 22 465 7

487 23 466 8

485 24 458 9

460 25 454 10 495 26 463 11 463 27 466 12 455 28 456 r

13 448 29 450 14 422 30 447 15 493 31 434 16 464 lNSTRUCTIONS On this format, list the average daily unit power level In MWe-Net for each day In the reporting month. Compute to the nearest whole megawatt.

(9/77) 5 r 'e-

2i

?

[

i i :4 i_

h it I

P s

^

~ 3

(

9

/

S F N

2 I

o 7 '

7

)

S F_

co h r ec

~

d e 0

0 u d 8

8 D

l

/

a e

1 0

.t d

8 3

e

/

8

^8 5

5 2

HG F E D CB A R, H

F

- - - - - - - - e.

hCW L

OO A O RR ME a 5

F tp d p e eaq s h e meg f i u o i r u u n in or ra n al e t p :

( t i t a l

e m

+

Ei s o t i n e xot r on a n l a a Ty c

0 0

- OsLn#r=OC p n r rg n t e

al t r e'F" vIOs%m^

U i

ia R a

N a

nE v ie o

l I

) r e n s r

l T

r i t u

R S

o n r T r

-N E

H r

g i e e c

(

c s

(

D A

mW4eOC P

U E

& t t E O

T x

i x

w R

D p

L o p

T O

W l

i n

'l M

N a

c a

O S

i e

i EGu. V O-c N

M. O n

n n

T A

)

s

)

c3vVO3c H

N e

I I

D OL.nOEWL E

M P

x tWVsu4** Oc c

A O

a m

u W

i g

E n

u R

a s

, e t

R t

i R

L E

D o

e l

n p E c 1

U ov o 9

C r e n 8

T s

t n s 5

I t e O

e N

S 3

4 32 1 M mhm*GE

- - - - e S

uOV&q m

OA M Mt J

t u a a h h t n n o e ou u d,

r ma a uOEcocWC2L 4

(

a l

l L

E t P

D C

uOVG o

x i S S

p cc P

m D

r Tp U o l

a S' a el n c i c.m l

e i k n r et t e

)

a p e t

P P

h d DN

.m r o mt oo o

a a N ow iof w n b t m.o.

d e n

e ey e e

r ir f r 5

4 p

me e 3

B 0

D 0

a r up e r 1

r 9

u 5

E 0E E f E t e ma d e 9

a a

0 x

1 v n ox t d iw d d

1 n

h 6 et r h eu f r a u C

8 f

5 e

0 i

1 n r i

r c l

t c a

5 o

5 b

)

ty Pb n e ol e e u

1 r

8 A

3 d

w er d s

d 5

r 1.

r i i

RS et c

a e

7 n

t e h p h t d kp t 3

T o

1 p e a G a o r

u o 3

h l

oe r -

n a im 9

o d

e.

S r t aI g p inp p m

a t s t n ee n

e a

E i s r

a f r s

n m

l r m e

m e

(

f ot i

if o L o n r i

r S

E r u

t n emt g

o R

oc ee y

3 u

)

L f t c

d s r o

w e e C

i i

rc F c Do n

ar m e

e a n t

t v o n

e i

l n t s r

eiv t

es a o

r c a e

e l

( e r

N U

R we E

m G

w i

1 L

r,

+

a

h Docket:No. 050-0331 Unit Name Ouane Arnold Energy Center 4

Date 09-15-85 MAJOR / SAFETY RELATED MAINTENANCE Completed by Bradf ord Thomas Telephone 319-851-7339-DATE SYSTEM.

COMPONENT DESCRIPTION 08/01/85'

' rimary Containment Drywell equipment sump Repaired.alr supply to discharge control valve r

1 08/02/85 Reactor Core isolation Coolinq RCIC Static Inverter Replaced.RCIC Inverter and cleaned contacts (RCIC) on power fallure' relay

'08/03/85' Feedwater Feedwater minimum flow.1Ine Repaired ieak in a f eedwater minimum flow.

~

drain line

'08/09/85'

. Primary Containment Drywell equipment sump timer Adjusted and cleaned contacts on equipment sump timer i

08/12/85 Fire Main Main fire header line Repaired leak in fire header I I' n e I

c 08/26/85' Residual Heat Removal Service RHRSW pump check valve

. Repaired check valve Water (RHR$W)

I A

e

\\

e 9

e 3

e Docket No. 050-0331 Unit Name Duane Arnold Eneroy Center Date 09-15-85 Completed by Bradford Thomas Telephone 319-851-7539 i

REFUEllNG INFORMATION t

1 Name:of facility.

A.

Duane Arnold Energy Center 2

Scheduled date for next refueling shutdown.

A.

1987 3.

Scheduled date for restart following refueling.

A.

1987 I

4 Will~ refueling or resumption of operation thereafter require a technical specification change or other license amendment?

A.

None currently Identitled 5.

Scheduled date(s) for submitting proposed licensing action and i-supporting Information.

A.

None currently Identifled 6

Important licensing considerations associated with refueling, e.g.,

new or different fuel design or supplier, unreviewed design or_ performance analysis methods, significant changes In fuel. design, new operating j

procedures.

No.

7 The number of fuel a s sem bl i e s (a) In the core and (b) in the spent fuel storage pool.

A.

a) 368 b) 696 8.

The present licensed spent fuel pool storage capacity and the size of any Increase in licensed storage capacity that has been requested or Is planned, in number of fuel assemblies.

A.

-2050 9

The' projected date of the'last. refueling that can be discharged to the

' spent fuel pool-assuming the present licensed capacity.

'A.

1998 4

L i

.~,

-n-

~

.r.

, - ~

e Docket No. 050-0331 Unit Name Duane A rnold Energy Center Date 09-15-85 Completed by Bradf ord Thomas Telephone 319-851-7339 NARR A TI VE S UMM ARY OF OPERATING EXPERIENCE 08/01/85 At the beginning of the month the Duane Arnold Energy Center was producinq power at 495 MWe (gross).

At 0846 hours0.00979 days 0.235 hours 0.0014 weeks 3.21903e-4 months a 7 day LCO was entered due to an air supply leak on a drywell equipment sump discharge control valve.

Repales were made by 0936 hours0.0108 days 0.26 hours 0.00155 weeks 3.56148e-4 months and the LCO cancel l ed.

Iso'ation l

08/02/85 At 1108 hours0.0128 days 0.308 hours 0.00183 weeks 4.21594e-4 months a 7 day LCO was entered when the Reactor Core Cooling (RC IC ) was declared inoperable due to a faulty static inverter.

The static inverter was replaced and the system was declared operable at 1825 hours0.0211 days 0.507 hours 0.00302 weeks 6.944125e-4 months thus cancelling the 7 day LCO.

'(LER 85-031)

At 2154 hours0.0249 days 0.598 hours 0.00356 weeks 8.19597e-4 months reactor power was reduced to approximately 60% to secure a reactor feedwater pump in order to make repairs on a leaking drain line.

The pump was secured at 0208 t.ours on 08/03/85 and repairs were made by 1350 hours0.0156 days 0.375 hours 0.00223 weeks 5.13675e-4 months ..

At'2400 hours0.0278 days 0.667 hours 0.00397 weeks 9.132e-4 months the plant entered a region of operation in which the load line was greater tl a n 80% of rated power with core flow less than 45% of full flow.

A required surveillance was missed during the first two hours of operation.

(LER 85-032) 08/04/85 At 2131 hours0.0247 days 0.592 hours 0.00352 weeks 8.108455e-4 months the

'B' Emergency Diesel Generator (EDG) had successfully completed its operability test.

A fuel sample taken after the test was being analyzed.

At 0753 hours0.00872 days 0.209 hours 0.00125 weeks 2.865165e-4 months on 08/05/85 the

'A' EDG was removed from service, entering a 7 day LCO.

The fuel sample tests completed on

'B' EDG were silghtly above Technical Specification requirements for sediment levels, thus entering a 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months LCO as both diesels were Inoperable. At 1918 hours0.0222 days 0.533 hours 0.00317 weeks 7.29799e-4 months the

'A' EDG was returned to service ending the 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months LCO.

The

'B' EDG was declared operable on 08/06/85 at 0953 hours0.011 days 0.265 hours 0.00158 weeks 3.626165e-4 months cancelling the 7 day LCO.

(LER 85-033) 08/09/85 At 1700 hours0.0197 days 0.472 hours 0.00281 weeks 6.4685e-4 months , the drywell equipment sump timer failed during surveillance testing.

A 7 day LCO was entered.

Repairs were completed at 2053 hours0.0238 days 0.57 hours 0.00339 weeks 7.811665e-4 months thus ending the LCO.

08/12/85 At 1800 hours0.0208 days 0.5 hours 0.00298 weeks 6.849e-4 months during a fire pump operability test a leak was found in a temporary section of the main fire header.

The leaking section was isolated in preparation for repairs.- Isolating the leak also isolated all reactor building fire stations.

Fire hose was run between the reactor building stations and the standby transformer deluge water system, thus supplying water from an operable section of the -fire main to the reactor building fire stations. A roving fire watch was initiated at 1831 hours0.0212 days 0.509 hours 0.00303 weeks 6.966955e-4 months to compensate for the temporary loss-of' hose stations.

Repales were made and the system was returned to normal-service on 08/15/85.

(LER 85-029) i

e e

Docket No. 050-0331 Unit Name Duane Arnold Energy Center Date 09-15-85 Completed by Bradford thomas Telephone 319-851-7339 NARRATI VE

SUMMARY

OF OPERATING EXPERIENCE (Continued) 08/16/85 At 0035 hours4.050926e-4 days 0.00972 hours 5.787037e-5 weeks 1.33175e-5 months , the reactor water sample point was shifted from the Reactor Water Cleanup (RWCU) system to the recirculation loop sample point in preparation for removing the RWCU system from service for planned maintenance. At 1019 hours0.0118 days 0.283 hours 0.00168 weeks 3.877295e-4 months , it was found that there was no flow at the recirculation sample line due to a closed valve.

The valve was opened at 1019 hours0.0118 days 0.283 hours 0.00168 weeks 3.877295e-4 months , thus establishing sample flow and restoring conductivity monitoring.

It was noted that reactor water conductivity was acceptable both before and after this event.

The two other sample points remained operable throughout the event.

At 0348 hours0.00403 days 0.0967 hours 5.753968e-4 weeks 1.32414e-4 months , RWCU was removed from service for planned maintenance.

The system was returned to service at 2316 hours0.0268 days 0.643 hours 0.00383 weeks 8.81238e-4 months .

08/20/85 At 0310 hours0.00359 days 0.0861 hours 5.125661e-4 weeks 1.17955e-4 months ,.the ' A ', Re si dua l Heat Removal Service Water (RHRSW) pump discharge check valve stuck open during surveillance testing.

The pump was isolated from the system and a 30 day LC O c o mm e'n c e d. Repairs were made and the pump returned to service by 2l00 hours on 08/26/85 thus ending the LCO.

08/22/85 At 1350 hours0.0156 days 0.375 hours 0.00223 weeks 5.13675e-4 months ,-both Emergency Diesel-Generators (EDG) were decl ared technically Inoperable when a design deficiency was noted that could impact EDG operation during partial loss of offsite power concurrent with a loss of coolant accident. This placed the plant in a 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months LCO.

A system alteration was completed at 2240 hours0.0259 days 0.622 hours 0.0037 weeks 8.5232e-4 months to alleviate the condition, ending, the LCO.

(LER 85-036 pending) 08/30/85 At 0442 hours0.00512 days 0.123 hours 7.308201e-4 weeks 1.68181e-4 months the electric fire pump was removed from service for general maintenance, entering a7 day LCO.

Packing was repaired and ' the pump was returned to service at 1031 hours0.0119 days 0.286 hours 0.0017 weeks 3.922955e-4 months on 08/31/85 ending the LCO.

08/31/85-Normal power operation at 434 MWe (gross) with power levels limited due to low condenser vacuum pressure.

+

Iowa Electric Light and Ibwer Company September 13, 1985 DAEC-85-0780 Director, Office of Inspection and Enforcement U. S. Nuclear Regulatory Comission Washington, D. C.

20555 Attn: Document Control Desk

Subject:

Duane Arnold Energy Center Docket No. 50-331 Op. License DPR-49 August, 1985 Monthly Operating Report

Dear Sirs:

Please find enclosed 12 copies of the Duane Arnold Energy Center Monthly Operating Report for August, 1985. The report has been prepared in accordance with the guidelines of Regelatory Guide 1.16 and distribution has been made in accordance with DAEC Technical Specifications, Appendix A, Section 6.11.1.c and Regulatory Guide 10.1.

Very truly yours, Daniel L. Mineck Plant Superintendent - Nuclear Duane Arnold Energy Center DLM/BNT/kp*

Enclosures File A-118d, TE-5 cc: Director, Office of Inspection Mr. Phillip Ross and Enforcement U. S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission Maryland National Bank Building Region III_

Washington, D. C.

20555 799 Roosevelt Road Glen Ellyn, IL 60137 (1)

NRC Resident Inspector Director, Office of-Management and Mr. Dennis Murdock Program Analysis Central Iowa Power Cooperative U. S. Nuclear Regulatory Commission Box 2517 Washington, D. C. 20555 (1)

Marion, IA 52302 U. S. Nuclear Regulatory Commission Mr. Russ Gamble A7T'! Mr. M. Thadani Corn Belt Power Cooperative Phillips Building 1300 13th Street North Washington, D. C. 20555 Humboldt, IA 50548 INP0 Records Center 1100 Circle 75 Parkway Suite 1500 Atlanta, GA 30339

.rE 2.<(-

Gentern! Offist

In ikup 331

Cetlinr Itenpids, lemn 5:40G

319/398-4411 -

ML20135G249

Contents

Text

SUMMARY

SUMMARY

SUMMARY

Subject:

Dear Sirs:

Navigation menu

ML20135G249

Text

SUMMARY

SUMMARY

SUMMARY

Subject:

Dear Sirs:

Navigation menu

Search