ML100201016

Gnf 0000-0111-8036-R0-NP, GE14 Fuel Thermal-Mechanical Information

ML100201016
Person / Time
Site:	Browns Ferry
Issue date:	01/15/2010
From:	Global Nuclear Fuel
To:	Office of Nuclear Reactor Regulation
References
GNF 0000-0111-8036-R0-NP
Download: ML100201016 (15)

Text

ATTACHMENT 6 Browns Ferry Nuclear Plant (BFN)

Unit 1 Response to NRC Request for Supplemental Information Regarding Technical Specification Change TS-467 - Utilization of AREVA Fuel and Associated Analysis Methodologies GE14 Fuel Thermal Mechanical Information (Non-Proprietary)

Attached is the non-proprietary version of the GE14 Fuel Thermal Mechanical Information, GNF 0000-011 1-8036-RO-NP, dated January 2010.

GNFýr Global Nuclear Fuel Global, Nuclear Fuel AJoint Venture of GEToshiba, &Hitachi GNF 0000-011 1-8036-RO-NP Class I January 2010 Non-ProprietaryInformation GE14 Fuel Thermal-Mechanical Information Copyright 2010 Global NuclearFuels-Americas,LLC All Rights Reserved

GNF 0000-0111-8036-R0-NP Non-Proprietary Information INFORMATION NOTICE This is a non-proprietary version of the document GNF 0000-0111-8036-RO-P, from which the proprietary information has been removed. Portions of the document that have been removed are identified by white space within double square brackets, as shown here [ ]

IMPORTANT NOTICE REGARDING CONTENTS OF THIS REPORT PLEASE READ CAREFULLY The only undertakings of Global Nuclear Fuel-Americas, LLC (GNF) with respect to information in this document are contained in contracts between GNF and Tennessee Valley Authority (TVA), and nothing contained in this document shall be construed as changing those contracts. The use of this information by anyone other than those participating entities and for any purposes other than those for which it is intended is not authorized; and with respect to any unauthorized use, GNF makes no representation or warranty, and assumes no liability as to the completeness, accuracy, or usefulness of the information contained in this document.

ii

GNF 0000-0111-8036-RO-NP Non-Proprietary Information Section 1 GE14 Surface Heat Flux Limits for Fast Transients

1. Introduction

[r

((

The purpose of the work summarized in this letter is to transmit steady-state limits and establish ((

)) limits for the AREVA equivalent (( )), as well as a ((

)) for the case when either the steady-state or SHF limit is violated. These limits will ensure compliance with the (no) fuel melting and cladding plastic strain licensing limits when applied in conjunction with the AREVA transient code for GE14 fuel in Browns Ferry Unit 1.

2. Analysis

((

)) TOP and MOP are defined schematically in Figure 1.

The approach used to define (( )) limits for the AREVA transient code (denoted as AREVA-T below) Er )). A spectrum of transients was analyzed with AREVA-T. Results were summarized in terms of ((

Section 1-1

GNF 0000-0111-8036-RO-NP Non-Proprietary Information

)) values and transmitted to GNF, together with the internal power generation rates versus time for the transients. The internal power generation rates were used ((

These analyses were performed using standard GNF procedures. ((

)) Both rated and off-rated conditions were analyzed.

Section 1-2

GNF 0000-011 1-8036-R0-NP Non-Proprietary Information 11 Figure 1 Schematic of Thermal and Mechanical Overpowers Section 1-3

GNF 0000-011 1-8036-RO-NP Non-Proprietary Information

3. GE14 Results Rated and Off-rated Conditions Internal power generation rates and corresponding AREVA-T TOP and MOP results were provided for 8 FWCF transients and 9 LRNB transients. The equations governing the LHGRFAC calculation are shown below. The limits to be used with these equations are shown in Table 1. ((

Section 1-4

GNF 0000-0111-8036-RO-NP Non-Proprietary Information Table 1 SHF Limits for Use With AREVA-T for GE14 in ER1 1]

RWE MOP Limit for Off-Rated Transients

[8]

Section 1-5

GNF 0000-0111-8036-RO-NP Non-Proprietary Information LE Figure 2 FWCF TOP Correlation Section 1-6

GNF 0000-0111-8036-R0-NP Non-Proprietary Information Figure 3 LRNB TOP Correlation Section 1-7

GNF 0000-0111-8036-R0-NP Non-Proprietary Information 11I 1]

Figure 4 FWCF MOP Correlation

]1 Figure 5 LRNB MOP Correlation Section 1-8

GNF 0000-01 11-8036-RO-NP Non-Proprietary Information Figure 6 Comparison of TOP LHGRFAC based on AREVA-T and CHT 1]

Figure 7 Comparison of MOP LHGRFAC based on AREVA-T and CHT Section 1-9

GNF 0000-0111-8036-RO-NP Non-Proprietary Information

4. Summary TVA has provided GNF with (( )), as calculated by a specific AREVA transient code (AREVA-T), for a spectrum of fast transients. TVA has also provided internal heat generation versus time histories for each transient. GNF has applied its standard methodology to determine ((

)) Based upon (( )) AREVA and GSTRM results, GNF defined (( )),

these limits assure that when AREVA-T is applied to GE14 fuel in Browns Ferry Unit 1 that fuel melting and cladding plastic strain licensing limits are satisfied. Use of GNF ((

)) licensing limits are satisfied for GE14 fuel in Browns Ferry Unit 1. For transients that (( )) as defined in Section 4 must be applied to assure compliance with licensing limits. Steady state limits are also ((

)) with AREVA-T for short duration transients (< 60 seconds).

Section 1-10

GNF 0000-011 1-8036-RO-NP Non-Proprietary Information Section 2 Revised GE14 LHGR Limits for BF1 Table 1. Revised T-M LHGR limits for GE14 U0 2 U02 PP PPExpos LHGR (GWd/MTU) (kW/ft)

Table 2. Revised T-M LHGR limits for GE14 Gad rods 1% Gad 2% Gad 3% Gad 4% Gad PP PP PP PP PPExpos LHGR PPExpos LHGR PPExpos LHGR PPExpos LHGR (GWd/MTU) (kW/ft) (GWd/MTU) (kW/ft) (GWd/MTU) (kW/ft) (GWd/MTU) (kW/ft)

((

11 5% Gad 6% Gad 7% Gad 8% Gad PP PP PP PP PPExpos LHGR PPExpos LHGR PPExpos LHGR PPExpos LHGR (GWd/MTU) (kW/ft) (GWd/MTU) (kW/ft) (GWd/MTU) (kW/ft) (GWd/MTU) (kW/ft)

I]

Section 2-1

GNF 0000-0111-8036-RO-NP Non-Proprietary Information Figure 8. Revised T-M LHGR limits for GE14

((I Section 2-2