05000296/LER-1980-003-03, /03L-0:on 800126,while Performing Control Rod Exercise,Control Rod 18-55 Would Not Insert W/Normal Drive Pressure.Caused by Failed Seal in Hydraulic Control Unit Directional Control Valve.Valve Repaired

/03L-0:on 800126,while Performing Control Rod Exercise,Control Rod 18-55 Would Not Insert W/Normal Drive Pressure.Caused by Failed Seal in Hydraulic Control Unit Directional Control Valve.Valve Repaired

ML18024B356
Person / Time
Site:	Browns Ferry
Issue date:	02/22/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18024B355	List: 05000296/LER-1980-003, Forwards LER 80-003/03L-0 05000296/LER-1980-003-03, /03L-0:on 800126,while Performing Control Rod Exercise,Control Rod 18-55 Would Not Insert W/Normal Drive Pressure.Caused by Failed Seal in Hydraulic Control Unit Directional Control Valve.Valve Repaired
References
LER-80-003-03L-01, LER-80-3-3L-1, NUDOCS 8002260580
Download: ML18024B356 (3)

LER-1980-003, /03L-0:on 800126,while Performing Control Rod Exercise,Control Rod 18-55 Would Not Insert W/Normal Drive Pressure.Caused by Failed Seal in Hydraulic Control Unit Directional Control Valve.Valve Repaired

Event date:
Report date:
2961980003R03 - NRC Website

text

NR~RM 366

{7'77 )

LICENSEE EVENT REPORT U. S. NUCLEAR REGULATORY COMMISSION

~01 7

8 CON'T

~01 7

8 CONTROL BLOCK:

I A

L B

R F

9 LICENSEE CODE

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!PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION) 3Q2 0

0 0

0 14 15 LICENSE NUMBER 0>

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25 26 LICENSE TYPE 30 57 CAT 58 soURGE LLJQB 0

5 0

0 0

2 B

0 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 During normal power operation, while performin SI 4. 3.A.2 Control Rod Exercise QB

~03 4

Control rod 18-55 would not insert with normal drive pressure and was declared inoper-able (T. S.

3. 3.A.2.a).

Scram functions were not affected.

There was no danger to the public health or safety.

Previous occurrences:

none.

Redundancy not applicable.

~OB

~07

~08 80 7

8

~09 7

8 9

SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE Q11

~EQ>>

~BOY>

V A

L V

E E 8 LcJOi'9 Q 9

10 11 12

'13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LERIRO EVENT YEAR REPORT No.

COD6 TYPE No, Q17

~ REPDAT ~80

+

~00 3

+A

~<3 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN Q

ATTACHMENT NPRDQ PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS

@22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER Q1B PJgl9

~Q20

~Q2

+ ~ Q23

~NQ24

~LQ25 A

6 0

7 33 34 35 36 37 40 4l 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 0

Control rod 18-55 was full inserted in accordance with T.

S.

4. 3.A.2.

A i seal in the hydraiklic control unit directional control valve was fo of the rod inoperability.'he valve was repaired and a functional test successfull 3

conducted pr'for to returning the control rod to service.

The failure was random and 4

no recurrence control action is required.

45 7

8 9

FACILITY

~30 METHOD OF STATUS 30 POWER OTHER STATUS PQ DISCOVERY DISCOVERY DESCRIPTION Q32 E

Q20 ~09 1

Q28 NA

~BQ31 Surveillance test 4.3.A.2 8

9 10 12 13 44 45 46 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ35 LOCATIONOF RELEASEQ B

~Z Q33

~ZQ34 NA NA 8

9 10 11 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39 l ~00 0

QÃ Z

Q3>

NA 7

8 9

11 12 13 PERSONNEI. INJURIES 80 80 80 7

8 9

7 8

0 7

8 NAME OF PREPARER 9

11 12 LOSS OF OR DAMAGETo FACILITYQ43 TYPE

DESCRIPTION

~ZQ42, NA 9

10 P U8 LIC ITY ISSUED DESCRIPTION ~S

~NQ44 9

10 6 0 08860~0'HONE:

68 69 80 80 NRC USE ONLY

~4 80 O

i+

'ennessee, Valley Authority Browns Ferry Nuclear Plant LER SUPPLEMENTAL INFORMATION Form BF-17 BF 15.2 I/10/79 BFRO 296 /

8003 Technical Specification Involved Reported Under Technical Specification 6

7 2 b(2)

Date of Occurrence 1/26/8o Time of 9ccurrence 0252 Unit Identification and Descri tion'of Occurrence:

Control rod 18-55 would not insert with normal drive pressure.

Conditions Prior to Occurrence:

Unit 1 8 refueling outage.

Unit 2 8 80X power, normal operation.

Unit 3 8 91X power, conducting SZ 4.3.A.2, contxol rod exercise.

Action specified in the Technical Specification Surveillance Requirements met due to ino erable e ui ment.

Describe.

I 1

The control rod was declared inoperable and fully inserted in, accordance with T.

S. 3.3.A.2.a.

A arent Cause of Occurrence:

A failed seal in the hydraulic control unit directional control valve was found, to be the cause of the rod inoperability.

Anal sis of Occurrence:

There was no hazard to the public health or safety.

Corrective Action

The hydraulic control unit directional control valve seal was replaced, and a functional:test was successfully conducted prior to returning the control rod to service.

Failure Data:

None previous.

• Retention:

eriod - Lifetime; Responsibility - Administrative Supervisor

• Revision: