ML20211C917

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Model Analysis - Dts Mezzanine Plate System
ML20211C917
Person / Time
Site: 07201024
Issue date: 06/02/1999
From:
TRANSNUCLEAR, INC.
To:
Shared Package
ML20211C843 List:
References
1051-36, 1051-36-R00, NUDOCS 9908260132
Download: ML20211C917 (19)
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Text

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44) 2 1-99 Modal AnalysisiDTS 17 m

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e asasom I-Objective The objective of this calculation is to document the modal analysis of Dry Transfer System Mezzanine plate and provide mode shapes and panicipation factors in frequency range of 0 to 50 Hz.

H - References

1. TN Calc. No. 1051-29, Rev.0, " Dead Weight, Live leads and Section Propenies".
2. TN DWG. No. 1051-27, Rev.1, Dry Transfer System Roof Plate, Protective Cover and Mezzanine Details".
3. AISC, Manual of Steel Construction", Eighth Edition.
4. ANSYS Users Manual, Rev. 5.2, Volumes 1 to 4,1995, executed on HP UNIX Workstation HAL, see test report E-14715 for verification.
5. ' Ansys Output Files:

Mezzvib.db mezzvib.rst mezzvibp.out IH-Assumptions

1. The mezzanine plate and beams are assumed simply supported at the periphery.
2. Vibration modes are extracted and expanded to cover 0 to 50.9z. frequency range.

IV - Calculations, Discussion and Results A modal analysis was performed using the ANSYS Finite Element Program (Ref. 4). A three-dimensional finite element model of the mezzanine plate system was constructed using SHEL163 element (for 1.5-inch thick plate), BEAM 4 element (for five W12x120 beams) and MASS 21 (for concentrated equipment weights ). The plate and beams were coupled in all degrees of freedom since common nodes were used for beam and plate elements. The plate was assumed simply supported at its periphery. The plate and beam dimensions were taken from Ref.2. The equipment weight was taken from Ref.1. The element real constants are shown in Table 1. Figures 1 and 2 show the finite element model, load and displacement boundary conditions. The equipment weights were applied by mass elements shown in Figure 3. Program selected 500 master degrees-of-freedom were used in the analysis. Enough modes were expanded to obtain mode shape plots to cover 0 to 50 Hz. frequency range.

The following material properties were used for beam and plate (A-36 carbon steel) in the analysis:

Modulus of Elasticity, E = 29.5 x 10' psi 2 d Density = 0.289/386.4 =0.000748 lb.sec /in Poisson's ratio, p = 0.3 990e260132 990eis PDR ADOCK 07201024 3

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un mv CHECetEDSY The resulting nineteen modes, participation factors and effective mass (in Z - direction) are summarized in Table 2. These modes cover the 0 to 50 Hz. frequency range. The mode shape plots for significant modes 1,2,5,7 and 9 are shown in Figures 4 to Ba. Two views of each mode are shown for clarity.

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e canoev Table 1 Summarv of Real Constants used in the analysis Real Constant Elements Element Real Constants No.

Type 1

BEAM 4, W12x120 1

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Moment ofInertia = 1070 in 2

SHEll43, Plate 2

Thickness = 1.5 in.

Fig.1) z 3

MASS 21, element no. 3833 3

Mass = 6.470 lb. sec /in Fig.3) 4 MASS 21, element no. 3834 3

Mass = 12.940 lb. sec'/in Fig.3) 2 5-MASS 21, elements nos.

3 Mass = 11.646 lb. sec /in 3835,3836,3837,3838 (Fig.3) 3 6

MASS 21, elements nos.

3 Mass = 15.528 lb. sec /in 3839,3840,3841,3842 (Fig.3) i

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- Z (transverse) 2 (hz)

Direction (Ib.sec /in) 1 4.8 13.16 173.14 2

6.8

-0.46 0.21 3

10.3 0.45 0.20 4

11.8

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13.0 1.21 1.46 6

14.1 0.75 0.57 7

17.1 3.19 10.19 8

18.1 0.78 0.62 9

20.4 2.95 8.69 10 21.5 0.65 0.42 11 36.9

-0.25 0.06 12 46.8 1.39 1.93 13 52.4 1.19 1.41 i

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Figure 3 Mass Elements Used in the Finite Element Model 1

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Figure 4a DTS Mezzanine Plate Modal Analysis - Mode shape plot for Mode 1 (Y - View) 1 ANSYS 5.2 FEB 1 1999 09:53:05 DISPLACEMENT STEP-1 SUB -1 FREQ-4.754 RSYS=0 DMX

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Figure 5 DTS Mezzanine Plate Modal Analysis - Mode shape plot for Mode 2 Gso. View) 1 ANSYS 5.2 FEB 1 1999 09:55:58 DISPLACEMENT STEP-1 SUB -2 FREQ-6.82 RSYS=D DMX

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1 ANSYS 5.2 FEB 1 1999 D9:58:20 DISPLACEMENT STEP-1 SUB -5 FREQ-12.952 RSYS-D DMX.212794 DSCA-72.135 XV

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t, Section 7.2.1 Characterization of Sources 7-1 Providejustification for the assumption on page 7.2-1, that using a Westinghouse 17 x 17 SF assembly with an enrichment of 3.85 percent for estimating fission gas and volatile nuclide inventory, will produce an inventory not significantly different from the inventory that would be calculated using the design basis SF assembly in the rest of the report (e.g., a Babcock and Wilcox 15 x 15 assembly).

These nuclide inventories are used in Chapter 8 to show compliance with the accident dose limit in 10 CFR 72.106.

Revised Response: For consistency, the 15 x 15 B&W fuel assembly with an initial enrichment of 3.75 wt% U-235,40,000 MWD /MTU burnup (typical specific power of 37.5 MWMTU), and 5 year cooling time is used for estimating the fission gas, volatile nuclides, fines and crud inventory available for release from the DTS. The text of sections 7.2.1 and 7.2.2 will be changed appropriately. The following radionuclide inventory was calculated for the 15 x 15 B&W fuel assembly using the SAS2H module of the SCALE 4.3 code.

Radionuclide Inventory from the B&W 15 x 15 Fuel Assembly Isotope Ci/ Assembly Actinides Pu238 1.83E+03 fine Pu239 1.64E+02 fine Pu240 2.37E+02 fine Pu241 5.96E+04 fine Am241 6.09E+02 fine Cm244 1.33E+03 fine Fission Products H3 2.03E+02 gas Kr85 3.62E+03 gas Sr90 3.81E+04 volatile Y90 3.81E+04 fine Rul06 9.75E+03 volatile Rh106 9.75E+03 fine Sbl25 1.21E+03 fine Tel25m 2.97E+02 fine 1129 1.77E-02 gas Cs134 1.73E+04 volatile Csl37 5.40E+04 volatile Bal37m 5.10E+04 fine Cel44 6.99E+03 fine Prl44 6.99E+03 fine Pml47 2.29E+04 fine i

Sm151

~ 2.06E+02 fine Eu154 4.29E+03 fine Eu155 2.14E+03 fine

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His inventory will be used for performing the airborne off-site dose analysis during normal and anticipated occurrences during fuel transfer operation. The response to RAl#2, question 7-2 will describe the off-site dose analysis.'

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