ML070600303

CM ECR A2152754 Eval of Technical Basis for ECR OC-06-00879-001, 10/24/2006; Drywell Floor/Trough/Drainage Inspections and Repairs

ML070600303
Person / Time
Site:	Oyster Creek
Issue date:	10/27/2006
From:	- No Known Affiliation
To:	Office of Nuclear Reactor Regulation
References
A2152754
Download: ML070600303 (11)

Text

EVALUATION NBR: 05 ORIG DATE ASSIGNED:

EVALUATING ORG : OERT EVAL DUE DATE: 260CT06 EVAL ASIGND TO: MARKOS/KESTER DATE ASSIGNED: 250CT06 EVAL REQUEST ORG: OERT EVAL REQUESTOR: MARKOS,S EVAL STATUS  : ASIGND EVAL RETURNED BY:

IMPORTANCE C 0 D E : L 0EAP:- SCHEDULE CODE : DATE FIIXED:~

EVAL DESC: TECHNICAL BASIS FOR AWA FOR ECR 06-00879 THE CAVEATS LISTED IN THE FOLLOWING TECHNICAL EVALUATION PRKl 250CT06 MUST BE CAPTURED IN THE PLANNED WORK PACKAGE WITH PRKl 250CT06 APPROPRIATE SIGNOFFS. OV HOLD POINTS ARE REOUIRED. THE PRKl 250CT06 SCOPE OF THIS TECHNICAL EVALUATION IS NUCLEAR SAFETY PRKl 250CT06 RELATED. PRKl 250CT06 PRKl 250CT06

HIS TECHNICAL EVALUATION IS PERFORMED IN ACCORDANCE WITH PRKl 250CT06 PROCEDURE CC-AA-309-101. PRKl 250CT06 A PRE-JOB BRIEF HAS BEEN CONDUCTED IAW KU-AA-1212. THIS PRKl 250CT06 TECHNICAL EVALUATION WAS SCREENED AGAINST HU-AA-1212AND PRKl 250CT06 DETERMINED TO BE MEDIUM CONSEQUENCE AND RISK RANKED A 4. PRKl 250CT06 ACCORDINGLY, EXISTING PROCESS REVIEW IS ACCEPTABLE AND NO PRKl 250CT06 THIRD PARTY REVIEW IS REQUIRED. PRKl 250CT06 ,

PRKl 250CT06 SCOPE AND REASONS FOR EVALUATION: PRKl 250CT06 PRKl 250CT06 THIS TECHNICAL EVALUATION PROVIDES THE TECHNICAL BASIS PRKl 250CT06 FOR THE ADVANCED WORK AUTHORIZATION ASSOCIATED WITH ECR PRKl 250CT06 0 6 - 0 0 8 7 9 FOR CAULKING THE JOINT AT THE OUTBOARD PERIMETER PRKl 250CT06 OF THE ELEV. 10'-3" DRYWELL CONCRETE SLAB CURB AND THE PRKl 250CT06 DRYWELL STEEL SHELL. THE EVALUATION WILL EXAMINE THE PRKl 250CT06 IMPACT OF THE ADDITION OF THE PROPOSED CAULKING ON THE PRKl 250CT06 DESIGN BASIS ANALYSIS (REFERENCE 2) FOR SUCTION STRAINER PRKl 250CT06 DEBRIS GENERATION AND TRANSPORT. THIS SCOPE OF THIS PRKl 250CT06 TECHNICAL EVALUATION IS LIMITED TO PROVIDING THE PRKl 250CT06 TECHNICAL BASIS FOR AWA AND SHALL NOT BE USED FOR PRKl 250CT06 TURNOVER TO OPERATION. PRKl 250CT06 PRKl 250CT06 DETAILED EVALUATION: PRKl 250CT06 PRKl 250CT06 AT THE OUTBOARD PERIMETER OF THE ELEV. 10'-3" DRYWELL PRKl 250CT06 FLOOR, THE CONCRETE SLAB MEETS THE DRYWELL SHELL, THIS PRKl 250CT06 INTERFACE HAS BEEN PREPARED FOR CAULKING UNDER AWA #3. PRKl 250CT06 THE SCOPE OF THIS AWA IS TO APPLY THE CAULK TO THE JOINT. PRKl 250CT06 THE CAULK WILL LAP ONTO THE CONCRETE AND STEEL SURFACES PRKl 250CT06 BY 1/4" TO 1" ON EACH SURFACE. THE APPLICATION OF THE PRKl 250CT06 CAULK WILL MINIMIZE WATER SEEPAGE THROUGH THE SUBJECT PRKl 250CT06 JOINT. PRKl 250CT06 PRKl 250CT06 THE COMPUTED AMOUNT OF THE REQUIRED CAULKING MATERIAL IS PRKl 250CT06 ABOUT 830 OZ, WHICH IS ABOUT 81 LBS OF THIOKOL 2235M BY PRKl 250CT06 POLYSPEC, OUALIFIED MATERIAL FOR INSIDE DRYWELL PRKl 250CT06

• • • ACTION REQUEST *** PAGE: 02 A/R TYPE  : CM ECR A/R NUMBER : A2152754 REQUEST ORG  : OED A/R STATUS : ASIGND REQUEST DATE: 210CT06 STATUS DATE: 250CT06 REQUESTED BY: TAMBURRO LAST UPDATE: 270CT06 I PRINT DATE : 270CT06

• • • ACTION REQUEST *** PAGE : 03 A/R TYPE  : CM ECR A/R NUMBER : A2152754 REQUEST ORG : OED A/R STATUS : ASIGND REQUEST DATE: 210CT06 STATUS DATE: 250CT06 REQUESTED BY: TAMBURRO LAST UPDATE: 270CT06 PRINT DATE : 270CT06

The following calculation is estimate for the volume and weight of caulk applied around the perimeter of the drywell at the concrete slab / steel shell interface.

Iupper curb provide sealant at concrete/ drywell shell junction (Detail 1)

Curb around perimeter of Drywell floor see ,

sections b Floor Elevation 10'-3. I smslmAu o.rlnuurd.(.l Dia := 49.R approximate diameter at concrete/shell interface at upper curb h3Vd Length1 := Length1 = 153.9fi circumference Length2 := 2-10-(12.254 - 11.00-ft) ~ e n =~25 fi 2 summation of vertical lengths from lower curb to upper curb Lengthtotal := Length1 + Length;! Len&od = 178.9ft Using a caulk bead 1" high and a gap equal to 0.3"(approximate gap due to deterioration at the corner of the concrete slab) and caulk extending 1" horizontally beyond the gap (see Detail 1).

Use two triangular areas to approximate area of caulk t

-74I d Area :=& )

2 - d

+ (0.3.in).(0.3-h) 2 kea=/ ,439 y := 12.5.- Ibf density of sealant per vendor e-mail gal Weight := Volume-y weight $1, ~4

Data Pack K Issued November 7998 1502324320

,426275&-05 CtjldEidr z)\ / I Fire stop 3-6548 silicone RTV foam

/

~

Data Sheet RS stock numbers 779-037 and 779-043 Introduction Specifications 3-6548 silicone RTV foam is specially formulated to Has been blast tested in various seal configurations have fire resistant properties coupled with good and has been shown able to withstand explosive over flexibility under the most demanding conditions. It's pressures of up to 148kN/mzdepending on seal most effective when used to seal gaps and holes of all design.

sizes through which cables, wires, ductwork and It successfully passes many fire sealing tests.

'piping pass. Whilst it has been made to withstand high including:

temperatures and confine such hazards as smoke, fire 0 Factory Mutual Test ASTM E-I 19 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rating and gases, it can also be used to seal buildings and rooms from other damaging contaminants like dirt, 0 BS 476 (part 8 - 1972) - 1 through 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> rating dust and water. 0 Mobil hydrocarbon curve - 1 through 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> A two-part product supplied in liquid A and B rating components in one unit, can be easily mixed on-site, 0 NePia (Nuclear Energy Liability Insurance expanding rapidly to surround and completely seal off Association) - 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rating cables, conduits or piping within only minutes of being 0 Lloyd's Register of Shipping for Class A bulkheads, applied. for piping, and Class H bulkheads for cable trays and piping - 2 to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> rating 0 UL (Underwriters Laboratory) rating per Typical properties ASTM E-814.2and 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> Below are properties of hand mixed equal parts of part 0 Swedish National Authority for testing (Statens A and B at 25°C. Provningsanstalt) - 1, 1 % and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> ratings Working time Densltv I 1.O-2.0 min 14.0-20.0Ib/W I 0 SINTEF - 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> rating 0 CSTB - 3% hours rating.

3-6548 RTV foam is approved to meet the Benefits requirements for use in the construction of nuclear 0 Up to 6 hour6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> fire-rating can be achieved power plants and their safety control systems.It is a FM 0 Forms an airtight seal - prevents spread of smoke, and UL-classified material. (Factory Mutual Serial No.

water and other liquid or gaseous contaminants 26543 from DC Corporation and UL 10 B.)

0 Fast foaming - liquid foams and expands rapidly to Other ratings include HF-I according to UL 94 and a fill any size or shape of penetration Class I flame spread by ASTM E84.

0 Easy to repair - can be removed and replaced at will for changes or repair. Excellent adhesion to itself 0 Long lasting thermoset cure elastomer does not melt or soften at high temperature and has excellent UV and weathering resistance.

%ical Properties Typical properties of the LDSE can be found in the table to the right.

Fire Qualification Numerous full-scale fire tests have been successfully performed at nationally recognized, independent and accredited laboratories for various seal configurations including electrical and mechanical elements in large complex block out openings, gaining major insurance company and regulatory body acceptance.

Seal designs have been qualified both with and without permanent damming materials.

Pressure Testing Differential testing for electrical block out and mechanical penetrations with this design indicate a 20-psi pressure resistance with zero leakage using a four-inch depth of LDSE. Other configurations may vary with regard to pressure resistance.

Radiation Resistance LDSE has been subjected to substantial radiation exposure levels (2 x lo* Rads Gamma) with no significant changes reported to the material's physical properties.

Reparability LDSE can be selectively removed with relative ease using blunt non-conductive tools and devices.

Additions or deletions of elements can be easily accomplished, and new LDSE material can then be applied to previously cured material to become an integral matrix with the already installed LDSE.

Decontaminability Surface can easily be decontaminated.

Cure Time As indicated in the table above the cure time for the fast curing version is as little as 10 minutes, whereas the cure time for the regular cure is as long as 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. By special request, custom cure times can be formulated.

Packaging I DESCRIPTION NET WEIGHT CONTAINER AVG. SEAL VOLUME LDSE A 8 B Set 60 Lbs. 2 ea. 5 gal. (Set) 1.0 cu. Ft.

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Page 14

Kester. Paul R.

From: Cheryl Gilbert [cgilbert@polyspec.com] I Sent: Wednesday, October 25,2006 9:25 AM To: jrcpe@aol.com

Subject:

/ Thiokol2235M

John, The density of the Thiokol 2235M is 12.5 lbs./gal.

Sorry for the delay.

Cheryl Gilbert Customer Service Manager PolySpec, L P .

6614 Gant Road Houston, TX 77066 ,

Tel: 281-397-0033 F a : 281-397-6512 Email: cgilbert@polyspec.com Legal Notice Any recommendation or suggestion relating to the use of the products made by PolySpec, whether in its technical literature, or in response to specific inquiry, or otherwise, is based on data believed to be reliable; however, the products and information are intended for use by Buyers having requisite skill and know-how in the industry, and therefore it is for the Buyer to satisfy itself of the suitability of the products for its own particular use, and it shall be deemed that Buyer has done so, at its sole discretion and risk.

Variation in environment, changes in procedures of use, or extrapolation of data may cause unsatisfactory results. PolySpec warrants its products to be free from defects in material and workmanship. PolySpec makes no other warranties concerning this product. NO other warranties, either express or implied, or statutory, such as warranties of merchantability or fitness for a particular purpose, shall apply.

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P A2 152754-05, ATTACHMENT 5, PAGE 1 OF 3 October 25, 2006 CORROSION

/ CONTROL CONSULTANTS AND IABS, INC.

Howie Ray Oyster Creek Nuclear Generating Station AmerGen Energy Company, LLC Forked River, NJ Transmitted Electronically EVALUATION OF POLYSPEC/THIOKOL 2235M INDUSTRIAL POLYSULFIDE JOINT SEALANT FOR USE IN THE DRYWELL OF THE OYSTER CREEK NUCLEAR GENERATING STATION This letter report has been prepared at your request to provide my independent opinion concerning the suitability of PolyspecKhiokol2235M Industrial Polysulfide Sealant for use in the Oyster Creek Nuclear Generating Station (hereinafter Oyster Creek)

Drywell. My work on this effort is in accordance with your Contract No. 01003193 dated May 30,2006.

GENERAL INFORMATION As part of the Technical Evaluation associated with A2152754 ECR06-00879, I was asked to recommend a caulking material suitable for application to the drywell shell to concrete interface at Elevation 10. The recommended caulking must be suitable for the normal and accident environment in the Oyster Creek drywell and comply with the Oyster Creek licensing basis.

BASIS OF MY OPINIONS To form my opinions, I reviewed the following References concerning PolyspecKhiokol2235M Industrial Polysulfide Sealant:

1. Polyspec Thiokol2235M Technical Data Sheet

2. Polyspec Tliiokol2235M Material Safety Data Sheets (MSDS) (part A)

3. Polyspec Thiokol2235M Material Safety Data Sheets (MSDS) (part B) 1

A2152754-05,AlTACHMENT 5, PAGE 2 OF 3

4. Korea Atomic Energy Research Institute Certificate of Radiation qrocessing dated July 7, 1994

5. Thiokol TD-569N 5/69, Radiation Resistance of LP Liquid Polysulfide Polymer Based Compounds

6. Engineering Paper No. 893, The Effect of Nuclear radiation on Sealants

7. NSF International Letter dated November 20, 1997 with NSF Test Report concerning Thiokol2235-M

8. NSFIANSI 61-05 with Addendum 1.0 (2005) I

9. Environmental Parameters - Oyster Creek NGS (ES-027 Rev. 4)Tables 1 ,

and 2 GENERAL DESCRIPTIONS OF POLYSPEC/THIOKOL 2235111 INDUSTRIAL POLYSULFIDE SEALANT.

Thiokol2235M Industrial Polysulfide Joint Sealant, manufactured by Polyspec, is a high-performance, non-sag, NSF approved chemical resistant elastomericjoint sealant (Reference 1). Thiokol2235M is not soluble in water and is suitable for use in critical services such as drinking water (NSF approved) and jet fuel.

Based upon the NSF testing per Reference 10 of PolyspecKhiokol2235M Industrial Polysulfide Sealant for drinking water service (Reference 7), no leachable ionic species or chemicals in unacceptable quantities would be expected to be released from the PolyspedThiokol2235M Industrial Polysulfide Sealant if in service in the Oyster Creek drywell.

According to References 1,2 and 3, Polyspec/Thiokol2235M Industrial Polysulfide Sealant contains no solvents and, as such, will not chemically contaminate the Oyster Creek charcoal filters during application and cure.

I investigated the use of Polyspec!l%iokol2235M Industrial Polysulfide Sealant in similar applications as that proposed for Oyster Creek at nuclear power plants in the United States and overseas. This sealant is approved for use comparable to that proposed for Oyster Creek at a number of commercial nuclear power plants, including Peach Bottom (Exelon), Turkey Point 3&4 (FPL), St. Lucie 1 & 2 (FPL), Oconee 1,2 8z 3 (Duke), Catawba 1 & 2 (Duke), McGuire 1&2 (Duke), and Wolsong 1-6 (KHNP).

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A2 152754-05, AlTACHMENT 5, PAGE 3 OF 3 I

IRRADIATION AND PHYSICAL PROPERTIES REOUIREMENTS Reference 4 indicates that PolyspeclThiokol2235M Industrial Polysulfide Sealant was irradiation tested at 0.5 M R A D h (average) to a total absorbed dose of 200 MRAD (2E8 RADS), which envelopes the anticipated remaining plant life radiation exposure at I

the drywell shell to concrete interface at Elevation 10' (Reference 9).

I Reference 5, which contains information concerning the base polysulfide resin used in the formulation of Polyspec/Thiokol2235M Industrial Polysulfide Sealant, indicates that the physical properties of the sealant (particularly tensile strength and elongation) will be satisfactory after irradiation to a total absorbed dose of 1E$, which also envelopes the anticipated remaining plant life radiation exposure at the drywell shell to concrete interface at Elevation 10'.

I According to Thiolcol, the formulator of Polyspec/Thiokol2235M Industrial Polysulfide Sealant, the cured polysulfide polymer in Polyspec/Thiokol2235M Industrial Polysulfide Sealant exhibits acceptable mechanical properties after exposure to 250 deg F for one week (Reference 5). As such, the Polyspec/Thiokol2235M Industrial Polysulfide Sealant is acceptable for use on the drywell shell to concrete interface at Elevation 10'.

CONCLUSIONS It is my independent opinion that Polyspec/Thiokol2235M Industrial Polysulfide Sealant is suitable for application to the drywell shell to concrete interface at Elevation 10'.

Should you require additional information, please contact me.

Jon R Cavallo, PE, PCS Vice President 3