Countercurrent Flow Limitation at the Junction between the Surge Line and the Pressurizer of a PWR

<table>Flow patterns at the middle of the vertical pipe (Cylindrical tank (b), <svg height="11.375" id="M129" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 49.512501 11.375" width="49.512501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> mm, <svg height="12.4375" id="M130" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 52.799999 12.4375" width="52.799999" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> mm, <svg height="15.4" id="M131" style="vertical-align:-3.39064pt" version="1.1" viewbox="0 0 99.212502 15.4" width="99.212502" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.112)"><use xlink:href="#x1D449"></use></g>
<g transform="matrix(.012,-0,0,-.012,12.675,15.187)"><use xlink:href="#x4C"></use></g><g transform="matrix(.012,-0,0,-.012,19.184,15.187)"><use xlink:href="#x6F"></use></g><g transform="matrix(.012,-0,0,-.012,25.073,15.187)"><use xlink:href="#x77"></use></g><g transform="matrix(.012,-0,0,-.012,33.129,15.187)"><use xlink:href="#x65"></use></g><g transform="matrix(.012,-0,0,-.012,38.186,15.187)"><use xlink:href="#x72"></use></g>
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</svg> m<sup>3</sup>, and <svg height="15.45" id="M132" style="vertical-align:-3.43843pt" version="1.1" viewbox="0 0 56.75 15.45" width="56.75" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.112)"><use xlink:href="#x1D43D"></use></g>
<g transform="matrix(.012,-0,0,-.012,7.825,15.187)"><use xlink:href="#x1D43A"></use></g>
<g transform="matrix(.017,-0,0,-.017,21.788,11.112)"><use xlink:href="#x3D"></use></g><g transform="matrix(.017,-0,0,-.017,36.474,11.112)"><use xlink:href="#x39"></use></g><g transform="matrix(.017,-0,0,-.017,44.634,11.112)"><use xlink:href="#x2E"></use></g><g transform="matrix(.017,-0,0,-.017,48.51,11.112)"><use xlink:href="#x31"></use></g>
</svg> m/s).</table>

Science and Technology of Nuclear Installations

fig14

Figure 14

Figure 14: Countercurrent Flow Limitation at the Junction between the Surge Line and the Pressurizer of a PWR 