ML20203E834

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Rev 2 to LC5X, Leak Chase Channel Solution Film & Pressure Decay Procedure
ML20203E834
Person / Time
Site: LaSalle  Constellation icon.png
Issue date: 05/10/1979
From:
CBI NUCLEAR CO.
To:
Shared Package
ML20203E435 List:
References
LC5X, NUDOCS 9802270142
Download: ML20203E834 (5)


Text

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I toENTIFICATION LCSX i

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AND PRESSURE DECAY PROCEDURE CLASS MC COMPONENTS av onTc

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1.0 SCOPE

This procedure is to be applied when it is required to perform a solution film test and a pressure decay tcst of welds on leak chase channels installed over plate weld joints in the liner portion of the vessel. .

l l 2.0 PERSONNEL:

l 2.1 Personnel performing this examination shall be qualified l in accordance Nith the CBI/CBs?J Quality Assurance Manual for ASME Section III Products.

3.0 REFERENCE-lb/

3.1 S& L Spec J-2534 and S & L Spec J-2990, latest revision.

4.0 APPARATUS

l 4.1 Dial gauge and valves assembled for pressurizing and moni-toring leak chase channel zones. Gauge shall be 4-1/2"#

! or 6"d and shall be graduated over a range about double I the pressure decay pressure, but in no case should the range be less than 1-1/2 or more than 4 times that pressure.

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  • LEAK CHASE = CHANNEL SOLUTION FILM AND PRESSURE DECAY PROCEDURE 9Act uo. 2 or 5 woovct CLASS MC COMPONENTS 4.2 Leak Detector Solution: Seah. test concentrate, Snoop, LC.k/
Sensor, Leak Tec or equal.

4.3 Leak Detector Solution Applicators; Squeeze bottles, pump type sprayers, or e. qual.

5.0 PROCEDURE:-

5.1 Leak chase channels for penetrations may be n.anifolded together for testing. The numLar of penetrations mani-folded together will be at the discretion of the test per-sonnel in order to perform an efficient and thorough job of leak testing. Caution must be exercised in making a

the test connections in the manifold acsambly to' eliminate leakage. The testing assembly and the manifold assembly shall be tested for leakage before start of the test.

5.2 The weld surface under examination ; hall be viewed from a distagce of less than 24 inches and at an angle not less than 30 to the surface to be examined.

.3 Lighting shall be sufficient to illuminate the weld surface to be examined. In the area to be examined, the lighting shall be a minimum of 50 footcandles. (Illumination from 4

a standard 3 volt flashlight, or brighter light source, held within 24 inches is sufficient).

5.4 Vacuum box test welds which are to be covered by leak chase channels in accordance with, and as required, by the appli-cable vacuum box test procedure.

5.5 Remove dirt, mud, slag, moisture and debris from the leak chase channel welds. Leak chase channel zones must be j

free of standing water-that may have collected inside the' channels-during construction.

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00168 A REV J AN 7 7

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.- I-ioenrinCATion -LC5X CONTRACT 83671/2.

$nte LEAK CHASE ('; ANNE . SOLUTION FILM

.AND PRESSURE DECA' PROCEDURE **"'"' '

CLASS MC COMPONENTS 5.6 SOLUTION FILM TEST

5.6.1 Pressurize the lea't chase channel zone to 45 psi i

and hold for a soak time of 15 minutes minimum.

. 5.6.2 Apply leak detector solution to leak chase channel seal welds in a continuous film relatively free i of bubbles, Observe the solution film for indications

of leakage for at least 8 seconds.

j 5.6.3 All leakage detected is unacceptable.

I 5.6.4 If leakage is detected, nark the areas of leakage, releare the pressure in the leak chase channel

zom> ta atmosphere, repair, repressurize and repeat
t. s t e': u.1 thru 5.6.4.

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! 5.6.5 Upon satisfactory completion of this test, if nec-esaary, adjust pressure to 45 psi.

5.7 PRESSURE DECAY TEST 5.7.1 Disconnect test manifold, and leak test the mani-fold connection by applying detector solution over the connection opening. If leakage is detected, install a plug in the connection and solution film test.

i 5.7.2 Hold pressure for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

5.7.3 Temporarily record the following for the pressure decay test:

A. Leak chase channel zone number B. Date of test C. Time (at beginning and end of test)

D. ' Pressure (at beginning, Py, and end of test, P)*

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IDENTIFICATION LC5X

  • n ov. No. 2

' CONTRACT 83671/2 rari.e LF'( CIIASE CIIANNEL SOLUTION FILM '^ ' " ~ '

At > PRESSURE DECAY PROCEDURE CLASS MC COMPONENTS 5.7.4 Determine the pressure loss (P1-PI 2 5.7.5 A pressure loss greater than 2 psi in 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> is unacceptable.

5.7.6 If unacceptable pressure loss is detected, release air pressure from system being tested; repair; repressurize to 45 psi; and repeat steps 5.7.1 thru 5.7.5.

5.7.7 Upon satisfactory completion of this test, release pressure in the leak chase channel zone to atmosphere.

6.0 DOCUMENTATION

6.1 Acceptable completion of tests uhall be recorded by sign-off on Leak Test Report, Form WL 223** (Page 5 of 5).

    • Previous or future similar forms approved for use by the CBI QA Manual may be used.

l 00 4 68 A AEV J AN 7 7

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