ML20038B082

Errata 3 to Topical Rept NEDO-21697, LOCA Analysis Rept for VT Yankee Nuclear Power Station.

ML20038B082
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	08/31/1981
From:	GENERAL ELECTRIC CO.
To:
Shared Package
ML20038B068	List: ML20038B067 ML20038B074 ML20038B082
References
NEDO-21697-ERR, NEDO-21697-ERR-03, NEDO-21697-ERR-3, NUDOCS 8111240690
Download: ML20038B082 (7)

Text

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NUCLE AR ENERGY BUSINESS GROUP

• GENE RAL ELECTRIC COMPANY SAN JOSE, CALIFORNI A 95125 GEN ER AL h ELECTRIC APPLICABLE TO:

NED0-21697

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77NED149 ERRATA And ADDENDA T.i.E. N o. gg

,,, , LOCA Analysis Report for ,

"O' Vermont Yankee Nuclear Power U^

Station August 1977 NOTE: Correct allcopies of the applicable ISSUE DATE publication as specified belcw.

RE ERENCES INSTRUCTIONS

' YAc Ap (CORRECTIONS AND ADDITIONS) p LIRE) 1 Page iv Replace with new page iv 2 Page 3-1 Replace with new page 3-1 3 Page 4-3 Replace with new pagc 4-3 4 Page 4-8 Replace with new page 4-8 5 Page 4-11 Replace with new page 4-11 6 Page 4-13 Add new page 4-13 Changes are indicated by vertical bar in right-hand margin.

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1 of 1 8111240690 811113 P AG,.

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- o NED0-21697 LIST OF TABLES Table Title Page 1 Significant Input Parameters to the Loss-of-Coolant Accident 3-1 2 Summary of Break Spectrum Results 4- 5 3 LOCA Analysis Figure Summary - Non-Lead Plant 4-6 4A MAPLHGR Versus Average Planar Exposure 4-7 4B MAPLHGR Versus Average Planar Exposure 4-8 4C MAPLHGR Versus Average Planar Exposure 4-9 4D MAPLHGR Versus Average Planar Exposure 4-10 4E MAPLHGR Versus Average Planar Exposure 4-11 4F MAPLHGR Versus Average Planar Exposure 4-12 4G MAPLGHR Versus Average Planar Exposure 4-13 )

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s NED0-21697

3. INPUT TO ANALYSIS A list of the significant plant input parameters to the LOCA analysis is presented in Table 1.

Table i SIGNIFICANT INPUT PARAMETERS TO THE LOSS-OF-COOLANT ACCIDENT ANALYSIS Plant Parameters:

Core Therma.L. Power 1664 MWt, which corresponds to 105% of rated steam flow 0

Vessel Steam Output 6.75 x 10 lbm/h, which corresponds to 105% of rated steam flow Vessel Stean N=e Pressure 1055 psia Recirculation i ne Break Area for Large Breakt - Discharge 2.26 ft2 (DBA)

- Suction 4.14 ft2 L mber of Drilled Bundles 220 Fuel Parameters:

Peak Technical Initial Specification Design Minimum Linear Heat Axial Critical Fuel Bundle Generation Rate Peaking Power Fuel Type Geometry (kW/ft) Factor Ratio

• A. 7D230 7x7 18.5 1.5 1.2 B. 8D219 8x8 13.4 1.4 1.2 C. 8D274L 8x8 13.4 1.4 1.2 D. 8D274H 8x8 13.4 1.4 1.2 E. 8D274 (High Gd) 8x8 13.4 1.4 1.2 F. LTA 8x8 13.4 1.4 1.2 v'

G. 8D/LB28p 8x8 13.4 1.4 1.2

& P8DKB289

• To account for the 2% uncertainty in bundle power required by Appendix K, the SCAT talcula*.icn is performed with an MCPR of 1.18 (i.e., 1.2 divided by 1.02) for a bundle with en initial MCPR of 1.20.

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MED0-21697 4.5 RESULTS OF THE CHASTE ANALYSIS This code is used, with suitable inputs from the other codes, to calculate the fuel cladding heatup rate, peak cladding temperature, peak local cladding oxidation, and core-wide metal-water reaction for large breaks. The detailed fuel model in CHASTE considers transient gap conductance, clad swelling and rupture, and metal-water reaction. The empirical core spray heat transfer and channel wetting correlations are built into CHASTE, which solves the transient heat transfer equations for the entire LOCA transient at a single axial plane in a single fuel assembly. Iterative applications of CHASTE determine the maximum permissible planar power where required to satisfy the requirements of 10CFR50.46 acceptance Criteria.

The CHASTE results presented are:

o Peak Cladding Temperature versus time e Peak Cladding Temperature versus Break Area e Peak Cladding Temperature and Peak Local Oxidation versus Planar Average Exposure for the most limiting break size e Maximum Average Planar Heat Generation Rate (MAPLHGR) versus Planar Average Exposure for the most limiting break size A summary of the analytical results is given in Table 2. Table 3 lists the figures provided for this analysis. The MAPLHGR values for each fuel type in the Vermont Yankee core are presented in Tables 4A through 4G. )

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NEDO-21697 Table 4B MAPLHGR VERSUS AVERAGE PLANAR EXPOSURE Plant: Vermont Yankee Fuel Type: 8D219 Average Planar Exposure MAPLHGR PCT 0xidation l (MRd/t) (kW/ft) (*F) Fraction 200.u 11.4 2053. 0.021 1,000.0 11.5 2061. 0.021 5,000.0 11.9 2117. 0.023 10,000.0 12.1 2164. 0.026 15,000.0 12.3 2192. 0.029 20,000.0 12.1 2189. 0.029 25,000.0 11.3 2077. 0.020 30,000.0 10.2 1933. 0.012 35,000.0 9.6 1704. 0.004 )

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NEDO-21697 Table 4E MAPLHGR VERSUS AVERAGE PLANAR EXPOSURE Plant: Vertront Yankee Fuel Type: 8D274 (High Gd)

Average Planar Exposure MAPLHGR PCT 0xidation (mwd /t) (kW/ft) (*F) Fraction 200.0 11.1 2053. 0.019 1,000.0 11.1 2044. O.018 5,000.0 ll.6 2092. O.021 10,000.0 12.1 2141. O.024 15,000.0 12.2 2165. O.026 20,000.0 12.1 2170. 0.027 25,000.0 11,6 2119. O.023 30,000.0 10.6 1993. O.015 35,000.0 10.0 1751. 0.005 40,000.0 9.4 1671. 0.004 i

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NED& 21697 Table 4G MAPLHGR VERSUS AVERAGE PLANAR FlPOSURE e P PIANT: Vermont Yankee Fuel Type: 8DJtB289 & P8D)tB289 Average Planar Exposure MAPLHGR PCT 0xidation (mwd /t) (kW/ft) ('F) Fraction 200.0 11.2 2126 0.027 1,000.0 11.2 2119 0.026 5,000.0 11.8 2178 0.030 10,000.0 12.0 2185 0.030 15,000.L 12.1 2200 0.032 20,000.0 11.8 2187 0.031 25,000.0 11.3 2120 0.025 30,000.0 11.1 2095 0.023 35,000.0 0.008 10.4 1862 40,000.0 9.8 1784 0.006 I

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