ML20206T817

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Rev 12 to Surveillance Procedure 6.3.10.2, Instrument Line Flow Check Valve Test
ML20206T817
Person / Time
Site: Cooper 
Issue date: 09/13/1985
From: Brungardt R, King D
NEBRASKA PUBLIC POWER DISTRICT
To:
Shared Package
ML20206T643 List:
References
6.3.10.2, TAC-54682, NUDOCS 8607080231
Download: ML20206T817 (3)


Text

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SURVELLLANCE PROCEDURE 6.3.10.2 INSTRUMENT LINE FLOW CHECK VALVE TEST I.

PURPOSE A.

To ensure that all installed Harotta excess flow check valves function properly and meet their specifications on closed leakage (0.2 gpm to 0.7 gpm).

II.

DISCUSSION A.

The Marotta excess flow check valves are installed in the instrument lines to prevent uncontrolled leakage from the process line during a postulated condition when the instrument line breaks between the check valve and the instrument.

Leakage tests are performed to demonstrate that the leakage is within the Technical Specification requirements.

III.

REFERENCE MATERIAL A.

I & C Instruction Manual 105, Marotta Excess Flow Check Valve.

IV.

PREREQUISITES A.

Reactor vessel pressure holding at approximately 1000 psig.

V.

LIMITATIONS A.

Technical Specifications Section 4.7.D.I.b.2)d).

1.

Section 4.7.D.1.b.2)d) - At least once per operating cycle the operability of the reactor coolant system instrument line flow check valves shall be verified.

B.

Administrative Limits.

1.

All discrepancies shall be recorded in the Shift Supervisor's log.

2.

All testing shall be coordinated with the Control Room Operator.

VI.

PRECAUTIONS A.

Since the vessel is at 1000 psig, all valves should be opened and closed slowly.

B.

If very little or no flow through the check valve, check the Clearance Order book to see if the penetration isolation valve micht be tagged closed for some reason.

C.

The test apparatus should be held to prevent any whipping action and the free end pointed away from any person or equipment.

P R; vised By/Date Reviewed By/Date Date Rev Procedure Page 1 Of D. King 8/27/85 R. Brungardt 9/11/85 f.jg-gy' 12 6.3.10.2 1

Pages L

D.

Vessel pressure indication will be lost if not on proper level control before certain instruments are valved out (see notes in procedure).

E.

Be aware that the water may contain large amounts of radioactive contaminants.

F.

Vessel level indication will be lost when certain instruments are valved out (see notes in procedure).

C.

Be aware that the reference leg (s) for LT-61 (LI-86) will probably be lost during the test.

Have backfilling equipment available before taking this inctrument out of service.

H.

CRD differential pressure indication will be lost when certain instru-ments are valved out (so noted in procedure).

I.

Recirculation pump differential pressure and flow indication will be lost when certain instruments are valved out (so noted in procedure).

VII. TEST EQUIPMENT A.

One gallon plastic containers marked at

.2,

.3,

.4,

.5,

.6, and.7 gallon.

B.

Stopwatches.

C.

Test apparatus.

.tII.

PROCEDURE Note:

1.

Attachment "A" is written such that all instruments (with the exception of Steps 4., 6.,10., and 19) can be valved out before starting to test or can be valved'out one section at a time. If there is enough help available it would reduce testing time by i'aving one crew valving the instruments out, another crew (s) testing the check valves, and another crew valving the instru-ments back in.

2.

Each section lists instruments that can be valved back in after certain check valves are tested.

All instruments (with the exception of steps and/or parts of Steps 2., 13., 1$., and 19.)

can be valved in af ter testing of all check valves is complete or after each section of the check valves is tested, whichever is most convenient.

A.

Instrument Line Flow Check Valve Test.

1.

Obtain permission and signature from the Shift Supervisor before starting the test.

2.

Inform the Control Room Operator of the test.

3.

Contact Health Physics if water is suspected to contain radio-activity.

Proc dure Number 6.3.10.2 Date 6L A '2.f Revision 12 Page 9

Of 1

Pages

4.

Valve the instruments OUT (one section at a time or all allowable sections if so desired) as specified in the Valve Out (a) section of the applicable steps in Attachment "A" and initial Attachment "A".

5.

Perform the following test for each excess flow check valve as listed on Attachment "B".

a.

Verify that the required instrumente are valved out (as per Attachment "A") for the check valves to be tested.

b.

Perform valving operations and attach test apparatus as per the Can Test (b) section of the applicable step (s) in Attachment "A".

Hold the free end of apparatus to ensure it will discharge into c.

a bucket and slowly open the valve.

d.

After the check valve has been seated (as ' indicated by a reduced flow), catch the flow in a marked plastic container for 60 seconds.

Note: If the level is within the indicated limits on the container, record the value on the data sheet and initial the test point'.

If the amount is less than.2 or greater than.7 gallon, cycle the test valve a few times trying to seat the check valve. Repeat the test.

The procedure is written to test through the drain valves where possible.

There may be cases where not enough flow can be obtained through the drain valve. If this happens, try testing through the rack isolation valve that is listed on Attachment "B".

Perform valving operations and remove test apparatus as per the e.

Can Test (b) section of the applicable step (s) in Attachment "A".

6.

Valve the instruments IN (one section at a time or all allowable sections if so desired) as specified in the Valve In (c) section of the applicable steps in Attachment "A" and initial Attachment "A".

7.

After the testing is completed notify the Shift Supervisor.

8.

Verify that the racks have been returned to normal, date, and initial Attachment "A".

IX.

ATTACHMENTS A.

Instrument Valving List Data Sheets.

i B.

Check Valve Test Data Sheets.

C.

Instrument Rack Locations.

Procedure Number 6.3.10.2~

Date G-Q_W Revision 12 Page 3

Of 3

Pages r

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