ML20087L115

First Interim Significant Const Deficiency Rept 103 Re Radflex Wall Penetrations Installed by B&B Insulation,Inc. Insp Procedures Initiated.All RB-8 Seals Installed in Wall Penetrations Will Be Included in Rept.Next Rept by 840430

ML20087L115
Person / Time
Site:	Waterford
Issue date:	03/16/1984
From:	Gerrets T LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
103, W3K84-0631, W3K84-631, NUDOCS 8403270040
Download: ML20087L115 (5)

Text

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• a LOUISIANA 142 ORARONDE STREU POWER & LIGHT R O BOX 6008 . NEW ORLEANS. LOUSIANA 70174 45041 366 2345 UTIUTIES SYSTEM March 16, 1984 W3K84- 0631 Q-3-A35.07.103 L@ S OWE %

Mr. John T. Collins  ?

Regional Administrator, Region IV b1 22m U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 -

p Arlington, Texas 76012

REFERENCE:

Telecon C. N. Hooper (LP&L) and D. Tomlinson (NRC IV) on February 17, 1984

SUBJECT:

Wateriord SES Unit No. 3 Docket No. 50-382 Significant Construction Deficiency No. 103 "RADFLEX Wall Penetrations" First Interim Report In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the Interim Report of Significant Construction Deficiency No.

103, "RADFLEX Wall Penetrations". This item was previously reported as PRD No. 156.

Very truly yours,

4. W errets T. F.

Corporate Quality Assurance Manager TFG:CNH:SSTG Attachment cc: Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 (15 copies) 8403270040 840316 PDR ADOCK 05000382 O PDR

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< Mr. John T.-Collins March 16, 1984 W3K84-0631 Page 2 cc: ~ Director Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. E. L. Blake Shaw, Pittman, Potts & Trowbridge

~.1800 M Street, N.W.

-Washington, D.C. 20036 Pr. W. M. Stevenson Monroe & Lemann 1424 Whitney Building New Orleans, Louisiana 70130 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 Mr. W. A.. Cross 7910 Woodmont Avenue Suite 1200 Bethesda, Maryland 20814-e

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INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 103 j "RADFLEX WALL PENETRATIONS" INTRODUCTION

. This report is submitted pursuant to 10CFR50.55(e). It describes RADFLEX sealant material utilized in wall penetrations installed at Waterford 3 by B&B Insulation, Inc.

. To the best of our knowledge, this deficiency has not been reported to the USNRC. pursuant to 10CFR21.

- DESCRIPTION On January 20, 1984,'B&B Insulation, Inc., issued Technical Bulletin TB-101-1030 which stated:

-"Duri g the installation of RADFLEX* under certain conditions of temperature during the fill, or where heat was used on the material during installation. a slight shrinkage of the fill may or. cur. Most notable, when'temperat re of material at the time of installation is

-greater than.20*F from ambient temperature after cure, a small

-space, varying from less than'l.125 inches on small penetrations (4" s or less) to as much as .75 inches on very large penetrations (greater.than 30"), may. occur.

Inspection of the seal shall be accomplished without damage ro the flexible boot,'except that where suspect voide are found; the fill patch may be. removed..

WALL SEALS

~1.' Visually check' appearance of the boot's shape. If lower side of boot is excessively sagging (below the tangent.

planeLof the sleeve), proceed to step three.

2. , Physically feel the upper: side of the boot. If a notable space feels evident near the uppermost portion of the

. penetration, proceed to step.three.

-3. -a. Where normal filling of the penetration has occurred' by cutting a hole into the boot, remove the patch and ivisually check for a void at the inner upmost

-position of the fill. (A fill of less than'100%

is not acceptable.)

.b. 1 Where optional filling'(reference IP 1030.112, item 6.2.2.2) of-the penetration has occurred by filling through a (see-drilled hole in.the sleeve, remove the plug and visually check for a void at the inner, upmost-portion of.the fill.

(A fill of less than

~100% is not acceptable.)

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- SC) No. 103 Page 2 I

4. a. If the fill is found to be satisfactory and if normal filling of the sleeve occurred, implement part 6.4.1 of procedure 1[P 1030.112 to close the hole in the boot,

b. If the fill is found to be satisfactory and if optional filling of the sleeve occurred, replace the metal plug.

c. If the fill is found NOT to be satisfactory in either case, proceed to item five. .

-5. Install additional RADFLEX* using a mechanical or pneumatic. caulking gun. Attach a .125 inch ID (or larger, if appropriate) tube to the caulking gun of a sufficient length to reach the far side of the penetration. Pump an additional amount of RADFLEX* into the void sufficient to fill the penetration. The material temperature should be not more than 10*F above ambient temperature. Using duct

-tape, temporarily close the opening until the RADFLEX* has

, cured. Then implement part 4 a or b as appropriate to -

close out the inspection and/or repair.-

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6. Existing Quality Control procedures for documentation of RADFLEX* installation shall apply.

FLOOR SEALS Since normal practice cf installation includes the fill of the top extended sleeve, any amount of shrinkage that has occurred

- .should not reduce the amount of fill to create a void within the substrate area. Floor seals are not, therefore, subject to this inspection."

SAFETY IMPLICATIONS p

RADFLEXA penetration sealant has been utilized throughout the plant to accommodate' thermal expansion of system piping during all modes of operation and test, and provides radiation shielding for penetrations between areas with varying dose' rate levels. Also, RADFLEX* is provided in penetrations to prevent the transmission of heat and smoke to adjoining areas in the event of '

fire. Shrinkage of the RADFLEX* fill (as much as .75" for penetrations greater than 30") could. result in activity levels in certain areas higher than Loriginally anticipate.d. and the inability to maintain the fire resistant integrity of-the barrier penetrated.

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4- 'e L SCD No. 103 Page 3

CORRECTIVE ACTION l Monconformance P.eport W3-7259 has been initiated to track and document this '

deficiency.

All RB-8 seals will be included in this NCR, where they are installed in wall penetrations. The RB-8 is a RADFLEX* seal.

The inspection procedure outlined in the references B&B Tech Bulli. tin (TB-101-1030) is acceptable with these exceptions. Small voids (.250 inches or less) will be undetectable with boots in place. Both boots will be removed

-on all RB-3 and RB-4 seals to facilitate adequate inspection. On all RB-8 seals, the single boot will be removed for inspection.

The' consistency of the RADFLEX* material, when fully set, will allow removal of.the boots for inspection without loss of or significant distortion of material.

r A Final Report will be submitted on April 30, 1984.

• B&B Trademark L-_-_____________.

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