[표제지 등]
제출문
Summary
요약문
Contents
Development of CFD Analysis Technology for the Regulatory Structural Integrity Assessment of a PWR Pressurizer Surge Line Subjected to Thermally Stratified Flow 15
1. Introduction 17
2. Mathematical Formulation 21
3. Evaluation of Conjugate Heat Transfer Effect 27
3.1. Conjugate Heat Transfer 27
3.2. Problem definition and methodology 27
3.3. Time-Step Independency Test 28
3.4. Mesh Independency Test 29
3.5. Results and Discussion 30
3.6. Conclusions 32
4. Results and Discussion 51
4.1. Problem definition and methodology 51
4.2. Out-Surge Case 52
4.3. In-Surge Case 53
5. Conclusions 81
Reference 83
Appendix A. 고리 1호기 계속운전 심사관련 안전현안에 대한 기술검토의견서 85
Table 2.1. Properties variations of light water according to the variation of temperature (Pref(이미지참조)=2.2408 MPa) 23
Table 3.1. Geometrical data and materials properties 33
Table 4.1. Geometrical data and materials properties 55
Figure 1.1. Thermally stratified flow in circular pipes 19
Figure 2.1. Configuration of pressurizer surge line and locations of monitoring points at a certain cross-section 24
Figure 2.2. Properties variations of light water according to the variation of temperature (Pref(이미지참조)=2.2408 MPa) 25
Figure 3.1. The geometry and dimensions of a typical pressurizer surge line 34
Figure 3.2. Temperature at the top, mid or bottom inner pipe surface of the cross-section a-a' through f-f' according to the variation of time step size for out-surge case 35
Figure 3.3. Temperature at the top, mid or bottom inner pipe surface of the cross-section a-a' through f-f' according to the variation of time step size for in-surge case 36
Figure 3.4. Temperature at the top, mid or bottom inner pipe surface of the cross-section a-a' through f-f' according to the variation of the node numbers for out-surge case 37
Figure 3.5. Temperature at the top, mid or bottom inner pipe surface of the cross-section a-a' through f-f' according to the variation of the node numbers for in-surge case 38
Figure 3.6. Transient temperature distributions at the inner wall surface for out-surge case at t=200 sec 39
Figure 3.7. Transient temperature distributions at the cross-section a-a' through f-f'(see Fig. 2.1) for out-surge case at t=200 sec 40
Figure 3.8. Transient evolutions of temperature difference between the top and bottom inner wall surfaces of cross-section a-a' through f-f'(see Fig. 2.1) for out-surge case 42
Figure 3.9. Transient temperature distributions at the inner wall surface for in-surge case at t=200 sec 45
Figure 3.10. Transient temperature distributions at the cross-section a-a' through f-f'(see Fig. 2.1) for in-surge case at t=200 sec 46
Figure 3.11. Transient evolutions of temperature difference between the top and bottom inner wall surfaces of cross-section a-a' through f-f'(see Fig. 2.1) for in-surge case 48
Figure 4.1. The geometry and dimensions of the pressurizer surge line utilized in Kori unit 1 56
Figure 4.2. Configuration of the pressurizer surge line for Kori unit 1 and locations of monitoring points at a certain cross-section 57
Figure 4.3. Transient temperature distributions at the wall surface for out-surge case at t=300 sec 58
Figure 4.4. Transient temperature distributions at the cross-section a-a' through f-f'(see Fig. 4.2) for out-surge case at t=300 sec 59
Figure 4.5. Transient evolutions of temperature difference between the top and bottom inner or outer wall surfaces of cross-section a-a' through f-f' (see Fig. 4.2) for out-surge case 60
Figure 4.6. Transient evolutions of temperature difference between the top and bottom inner or outer wall surfaces of cross-section a-a' through f-f' (see Fig. 4.2) for three inlet velocities for out-surge case 63
Figure 4.7. Transient temperature distributions at the wall surface for in-surge case at t=300 sec 69
Figure 4.8. Transient temperature distributions at the cross-section a-a' through f-f'(see Fig.4.2) for in-surge case at t=300 sec 70
Figure 4.9. Transient evolutions of temperature difference between the top and bottom inner or outer wall surfaces of cross-section a-a' through f-f' (see Fig.4.2) for in-surge case 71
Figure 4.10. Transient evolutions of temperature difference between the top and bottom inner or outer wall surfaces of cross-section a-a' through f-f' (see Fig.4.2) for three inlet velocities for in-surge case 74