ML18200A138
| ML18200A138 | |
| Person / Time | |
|---|---|
| Site: | 07109360 |
| Issue date: | 06/19/2018 |
| From: | Industrial Nuclear Co |
| To: | Division of Spent Fuel Management |
| Allen W C | |
| Shared Package | |
| ML18200A137 | List: |
| References | |
| EPID L-2018-LRM-0134 | |
| Download: ML18200A138 (35) | |
Text
Industrial Nuclear Company, Inc.
Ten Hole Source Changer Model THSC Docket No. 71-9360 A Presentation to the US Nuclear Regulatory Commission June 19, 2018
> NRC #2, June 19, 2018 2 Agenda Introduction Description of THSC PackageMaterials of Construction THSC Payload Descriptions Certification Test ResultsVerification of Shield Integrity Submittal Schedule Summary
> NRC #2, June 19, 2018 3 Description of THSC Package Enclosed, Right Circular Cylinder12-3/4" OD x 14-1/2" High Welded Stainless Steel Construction Depleted Uranium Gamma Shield Titanium Source Tubes/HubGross Weight: Approximately 330 lb
> NRC #2, June 19, 2018 4 Description of THSC Package (con't)
> NRC #2, June 19, 2018 5 Description of THSC Package (con't)Shown without bottom support channelsTOP DU SUPPORT PIPELOCK BOX ASSEMBLYCOPPER SHIM, TYPSIDE DU SUPPORT CHANNELPLASTIC BURN-OUT PLUGS(3 PLACES) 3 8" CLOSURE LID BOLTS(8 PLACES) UPPER DUSUPPORT RING 3 8" THK MOUNTING PLATESOURCE TUBE ASSEMBLY(TITANIUM)DEPLETED URANIUM (DU) SHIELD DU LOWERSUPPORT RINGPOLYURETHANE FOAM
> NRC #2, June 19, 2018 6 Materials of Construction Structural:Type 304 stainless steel plate, bar, and pipeASTM A320 L7 or L43 Closure Lid & Lock Box BoltsAll welded construction encasing gamma shieldCopper shims between DU and stainless steel contact pointsPolyurethane foam for insulation & impact mitigation0.50" OD x 0.056" wall titanium source tubesTitanium hub Gamma ShieldingCast depleted uranium (DU)All materials have previously been used in currently NRC licensed source changers and radiation cameras
> NRC #2, June 19, 2018 7 THSC Payload Description ContentsIridium 192 (Ir-192) capsulesSelenium 75 (Se-75) capsulesLicensed as Special Form Contents limits1,500 Ci total limitMaximum 150 Ci per capsuleMaximum of 10 capsules per package
> NRC #2, June 19, 2018 8 Regulatory Compliance Plan Structural evaluations:NCT compression and free drop, HAC free & puncture drops, by testAll other NCT and HAC load cases by analysisThermal evaluation by comparison to IR-100 thermal test:Thermal test not necessary since DU shield not exposed following all free and puncture drop testsIR-100 thermal test demonstrated no shielding degradation occurs
provided DU shield remains protected by stainless steel body Shielding evaluationNCT and HAC dose rates by test
> NRC #2, June 19, 2018 9 Certification Test Results Test ObjectivesDemonstrate resistance to compressive force per
§71.71(c)(9)Demonstrate no degradation in shielding capability of package occurs after a worst-case sequence of free and
puncture dropsDemonstrate retention of special form capsules within the
gamma shield Free/Puncture drop tests performed at Oak Ridge National Laboratory, March 27-28, 2018
> NRC #2, June 19, 2018 10 Certification Test Results (con't)
Compression TestTest per 10 CFR §71.71(c)(9), greater of:5 times weight of package (=1,650 lb) orEquivalent of 13 kPa (2 lb/in
- 2) multiplied by vertical projected area of package (=255 lb)Applied force: 1,652 lbResult: No deformation of package after 24 hrs
> NRC #2, June 19, 2018 11 Certification Test Results (con't)
Compression Test
> NRC #2, June 19, 2018 12 Certification Test Results (con't)
Free and Puncture DropsTwo full-scale, prototypic CTUs Demonstration basis: radiation dose rates comply with §71.51(a)(2) radiation limits after series of free
and puncture dropsUse of actual radioactive source capsulesPost-test readings versus pre-test readings Tests Performed per 10 CFR §71.73Five Free DropsTwo Puncture Drops
> NRC #2, June 19, 2018 13 Certification Test Results (con't)
Free and Puncture Drops Test ConditionsFor high-impact drops, DU temperature cold (~ -20 °F)Bottom down orientation, NCT & HACFor maximum crush deformation and/or high-impact drops, temperature was at NCT hot condition (~140°F) Top down, CG-over-corner Top down SideAll puncture drop tests were performed with CTUs at post-free drop test temperature condition
> NRC #2, June 19, 2018 14 Certification Test Results (con't)
Free and Puncture DropsOne NCT, 4-ft free bottom down drop, Cold (CTU-1)Four HAC 30-ft free dropsBottom down, Cold (CTU-1)Top down, CG-over-corner , Hot (CTU-1)Top down, Hot (CTU-2)Side, Hot (CTU-2)Two puncture dropsTop down, CG-over-corner (CTU-1)Side (CTU-2)
> NRC #2, June 19, 2018 15 Certification Test Results (con't)
Free and Puncture Drops Data collectedSurface temperature of DU shieldPhotographsNormal & high speed video MeasurementsCrush distance, puncture damage (if any)Radiation Dose RatesPre-and post-test No reduction in shielding capability recorded
> NRC #2, June 19, 2018 16 Certification Test Results (con't)
CTU-1NCT 4-ft Bottom Down Drop, DU Surface -19 °F
> NRC #2, June 19, 2018 17 Certification Test Results (con't)
CTU-1HAC 30-ft Bottom Down Drop, DU Surface < -7 °F
> NRC #2, June 19, 2018 18 Certification Test Results (con't)
CTU-1HAC 30-ft CG-Over-Top Corner Drop, CTU Temp 156 °F
> NRC #2, June 19, 2018 19 Certification Test Results (con't)
CTU-1HAC 40-inch Puncture on CG-Over-Top Corner Damage, CTU Temp 70 °F
> NRC #2, June 19, 2018 20 Certification Test Results (con't)
CTU-2HAC 30-ft Top Down Drop, DU Surface 153 °F
> NRC #2, June 19, 2018 21 Certification Test Results (con't)
CTU-2HAC 30-ft Side Drop, DU Surface >120 °F
> NRC #2, June 19, 2018 22 Certification Test Results (con't)
CTU-2HAC 40-inch Puncture on Side Damage, CTU Temp 85 °F
> NRC #2, June 19, 2018 23 Certification Test Results (con't)
CTU-1 Post-Test ResultsInspection of the mounting plate/lock boxes experienced no damage from NCT or HAC drop testsBrass dust caps dislodged (not lock wired for test)
> NRC #2, June 19, 2018 24 Certification Test Results (con't)
CTU-2 Post-Test Results Inspection of the mounting plate/lock boxes revealed mounting plate was bowed inward from
HAC side drop impact:0.380 inch at Tube 6 (adjacent to side impact)0.233 inch at Tube 10 (180°from side impact)Deformed mounting plate slightly moved lock
box/source pigtail from the designed stored
position in DU shieldBrass dust caps dislodged (not locked wired in test)
> NRC #2, June 19, 2018 25 Certification Test Results (con't)
CTU-2 Post-Test Results (con't)
> NRC #2, June 19, 2018 26 Certification Test Results (con't)
CTU-2 Post-Test Results (con't) View of Tube 6 (left) and Tube 10 (right) illustrating post-test mounting plate deformation
> NRC #2, June 19, 2018 27 Certification Test Results (con't)
Details of DU Shield DU shields procured from Aerojet Ordnance TNCTU-1 Shield (2012):Shield Weight: 235 lbOne source tube damaged during casting, only (9) source tubes useableGross package weight: 328 lbCTU-2 Shield (2014):Weight: 225 lb During casting, upper mold broke, which resulted in a 2-step
casting process All (10) source tubes useableGross package weight: 319 lb
> NRC #2, June 19, 2018 28 Certification Test Results (con't)
Radiation SurveysBoth pre-test and post-test surveys were performed using actual Ir-192 special form capsules:Pre-Test: 110 Ci/capsule (total of 1,110 Ci max)Post-Test: 105 Ci/capsule (total of 1,050 Ci max)During CTU-2 post-test survey, it was discovered that a trap plate was inadvertently installed in lock boxes on
CTUsPlate utilized for the IR-50 Source ChangerPrevented source capsules from being positioned in designed stored position near/against titanium hubEffect was to increase measured surface dose rates
> NRC #2, June 19, 2018 29 Certification Test Results (con't)Radiation Surveys (con't) CTU-1 measured dose ratesTrap plate installed for both pre-test & post-test surveys
> NRC #2, June 19, 2018 30 Certification Test Results (con't)Radiation Surveys (con't) CTU-2 measured dose ratesTrap plate installed for both pre-test & post-test surveys
> NRC #2, June 19, 2018 31 Certification Test Results (con't)Radiation Surveys (con't) CTU-2 measured dose ratesMaximum surface dose rate comparison with & without trap plate installed
> NRC #2, June 19, 2018 32 Certification Test Results (con't)
Summary Regulatory ComplianceMinimal damage to package from free and puncture drops IAW 10 CFR §71.71 and §71.73No dislodgement of source capsulesPre-test and post-test radiation dose rates comply with 10 CFR §71.47(a) [NCT] and §71.51(a)(2) [HAC],
respectively
> NRC #2, June 19, 2018 33 Verification of Shield IntegrityBased on certification testing of two separate DU shields, acceptance tests in application for shield integrity will include:Ultrasonic examination at supplier's facilityShielding test upon receipt at INC facilityDimensional inspectionDU shields not passing all acceptance tests will not
be utilized in a THSC package
> NRC #2, June 19, 2018 34 Submittal ScheduleCertification testing -CompletedCompression Test -September 2017Free and Puncture Drops -March 2018Radiation Survey Tests -March (Pre-) & May (Post-) 2018 Anticipate submittal of application to NRC for Type B(U)-96 certification -4 th Quarter 2018Planning on approximately 5 months to first round
> NRC #2, June 19, 2018 35 IR-THSC Package Summary