title: ÐÐ±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¼Ð¾Ð´ÐµÑÐ½Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸, Ð²Ð»Ð¸ÑÑÑÐµÐ¹ Ð½Ð° ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²Ð¾ Ð´ÐµÐ±ÑÐ¸ÑÐ°, ÑÐ¾ÑÐ¼Ð¸ÑÑÑÑÐµÐ³Ð¾ÑÑ Ð² Ñ Ð¾Ð´Ðµ Ð°Ð²Ð°ÑÐ¸Ð¸ Ñ Ð¿Ð¾ÑÐµÑÐµÐ¹ ÑÐµÐ¿Ð»Ð¾Ð½Ð¾ÑÐ¸ÑÐµÐ»Ñ Ð½Ð° ÐÐµÐ½Ð¸Ð½Ð³ÑÐ°Ð´ÑÐºÐ¾Ð¹ ÐÐ­Ð¡ Ñ ÐÐÐ­Ð -1200
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Justification for the modernization of thermal insulation, affecting the amount of debris formed during a loss of coolant accident at the Leningrad NPP with VVER-1200
Creators: name: ÐÐ¾Ð¼Ð°ÑÐ¾Ð²Ð°, Ð¡Ð½ÐµÐ¶Ð°Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2024
Subjects: Ð°Ð²Ð°ÑÐ¸Ñ Ñ Ð¿Ð¾ÑÐµÑÐµÐ¹ ÑÐµÐ¿Ð»Ð¾Ð½Ð¾ÑÐ¸ÑÐµÐ»Ñ
Ð³Ð»Ð°Ð²Ð½ÑÐ¹ ÑÐ¸ÑÐºÑÐ»ÑÑÐ¸Ð¾Ð½Ð½ÑÐ¹ ÑÑÑÐ±Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´
Ð²Ð¾Ð»Ð¾ÐºÐ½Ð¸ÑÑÐ°Ñ ÑÐµÐ¿Ð»Ð¾Ð²Ð°Ñ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ñ
Ð¾ÑÑÐ°Ð¶Ð°ÑÑÐ°Ñ ÑÐµÐ¿Ð»Ð¾Ð²Ð°Ñ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ñ
ÑÐ¸ÑÑÐµÐ¼Ð° Ð°Ð²Ð°ÑÐ¸Ð¹Ð½Ð¾Ð³Ð¾ Ð¾Ñ Ð»Ð°Ð¶Ð´ÐµÐ½Ð¸Ñ Ð°ÐºÑÐ¸Ð²Ð½Ð¾Ð¹ Ð·Ð¾Ð½Ñ
loss of coolant accident
main circulating pipeline
fiber thermal insulation
reflective thermal insulation
emergency core cooling system

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ Ð¸Ð½Ð½Ð¾Ð²Ð°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸ ÑÐ¸Ð¿Ð° RMI Ð½Ð° ÑÐ¸ÑÑÐµÐ¼Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ Ð¿ÑÐ¸ ÑÐ°Ð·ÑÑÐ²Ðµ Ð³Ð»Ð°Ð²Ð½Ð¾Ð³Ð¾ ÑÐ¸ÑÐºÑÐ»ÑÑÐ¸Ð¾Ð½Ð½Ð¾Ð³Ð¾ ÑÑÑÐ±Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð° Ð² Ð¿ÑÐ¾ÑÐµÑÑÐµ Ð°Ð²Ð°ÑÐ¸Ð¸ Ñ Ð¿Ð¾ÑÐµÑÐµÐ¹ ÑÐµÐ¿Ð»Ð¾Ð½Ð¾ÑÐ¸ÑÐµÐ»Ñ Ð½Ð° ÐÐ­Ð¡ Ñ ÐÐÐ­Ð . ÐÐ°Ð´Ð°ÑÐ¸, ÑÐµÑÐ°ÐµÐ¼ÑÐµ Ð² ÑÐ¾Ð´Ðµ ÑÐ°Ð±Ð¾ÑÑ: 1. ÐÐ¿Ð¸ÑÐ°Ð½Ð¸Ðµ Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿Ð¸Ð°Ð»ÑÐ½Ð¾Ð¹ ÑÑÐµÐ¼Ñ Ð¡ÐÐÐ Ð¸ ÑÐ¿ÑÐ¸Ð½ÐºÐ»ÐµÑÐ½Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ. 2. ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ¾Ð² Ð´ÐµÐ±ÑÐ¸ÑÐ° Ð² ÐÐ. 3. ÐÐ¿Ð¸ÑÐ°Ð½Ð¸Ðµ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¹ ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸ ÑÐ¸Ð¿Ð° ÐÐÐ¢Ð Ð¸ RMI. 4. ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ Ð¼ÐµÑÑÐ° ÑÐ°Ð·ÑÑÐ²Ð° ÐÐ¦Ð¢, Ð² ÐºÐ¾ÑÐ¾ÑÐ¾Ð¼ Ð¾Ð±ÑÐ°Ð·ÑÐµÑÑÑ Ð¼Ð°ÐºÑÐ¸Ð¼Ð°Ð»ÑÐ½Ð¾Ðµ ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²Ð¾ Ð´ÐµÐ±ÑÐ¸ÑÐ°. 5. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ðµ ÑÐ°ÑÑÐµÑÐ° Ð²ÑÑÐ¾Ð´Ð° Ð´ÐµÐ±ÑÐ¸ÑÐ° Ð¿ÑÐ¸ ÑÐ°Ð·ÑÑÑÐµÐ½Ð¸Ð¸ ÐÐÐ¢Ð Ð² ÑÐ¾Ð´Ðµ ÑÐ°Ð·ÑÑÐ²Ð° ÐÐ¦Ð¢. 6. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ðµ ÑÐ°ÑÑÐµÑÐ° Ð²ÑÑÐ¾Ð´Ð° Ð´ÐµÐ±ÑÐ¸ÑÐ° Ð¿ÑÐ¸ ÑÐ°Ð·ÑÑÑÐµÐ½Ð¸Ð¸ ÐÐÐ¢Ð, ÑÐºÑÐµÐ¿Ð»ÐµÐ½Ð½Ð¾Ð¹ ÑÐ¾Ð¼ÑÑÐ°Ð¼Ð¸, Ð² ÑÐ¾Ð´Ðµ ÑÐ°Ð·ÑÑÐ²Ð° ÐÐ¦Ð¢. 7. ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ Ð¾ÑÑÐ°ÑÐ¾ÑÐ½Ð¾Ð³Ð¾ ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²Ð° Ð´ÐµÐ±ÑÐ¸ÑÐ° Ð¿ÑÐ¸ ÑÐ°Ð·ÑÑÑÐµÐ½Ð¸Ð¸ ÐÐÐ¢Ð, Ð½Ðµ Ð·Ð°Ð¼ÐµÐ½ÐµÐ½Ð½Ð¾Ð¹ RMI. 8. ÐÐ±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑÐ¸Ð»ÑÑÑÐ° Ð¡ÐÐÐ. 9. ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ ÐºÑÐ¸ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ Ð´Ð¸ÑÐ¿ÐµÑÑÐ½Ð¾Ð¹ ÑÐ¼ÐµÑÐ¸ Ð² ÑÑÑÐ±Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð°Ñ ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ DN Ð¿ÑÐ¸ ÑÐ°Ð·ÑÑÐ²Ðµ ÐÐ¦Ð¢. 10. ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ ÐºÑÐ¸ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ Ð´Ð¸ÑÐ¿ÐµÑÑÐ½Ð¾Ð¹ ÑÐ¼ÐµÑÐ¸ Ð² ÑÐµÐ¶Ð¸Ð¼Ð°Ñ Ð¼Ð°Ð»Ð¾Ð¹, ÑÑÐµÐ´Ð½ÐµÐ¹ Ð¸ Ð±Ð¾Ð»ÑÑÐ¾Ð¹ ÑÐµÑÐµÐ¹ Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ DN 600. Ð Ð°Ð±Ð¾ÑÐ° Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð° Ð½Ð° Ð±Ð°Ð·Ðµ ÐÐ Â«ÐÑÐ¾Ð¼ÑÐ½ÐµÑÐ³Ð¾Ð¿ÑÐ¾ÐµÐºÑÂ», Ð³Ð´Ðµ Ð±ÑÐ»Ð¸ Ð¿Ð¾Ð»ÑÑÐµÐ½Ñ Ð¸ÑÑÐ¾Ð´Ð½ÑÐµ Ð´Ð°Ð½Ð½ÑÐµ Ð´Ð»Ñ ÑÐ°ÑÑÐµÑÐ¾Ð², Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ñ Ð´Ð»Ñ Ð¸Ð·ÑÑÐµÐ½Ð¸Ñ Ð¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ ÑÐ°ÑÑÐµÑÐ½Ð¾Ð³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð°. ÐÐ¾ Ð¸ÑÐ¾Ð³Ñ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ Ð±ÑÐ»Ð¸ Ð¿Ð¾Ð»ÑÑÐµÐ½Ñ Ð²ÐµÐ»Ð¸ÑÐ¸Ð½Ñ Ð¼Ð°ÐºÑÐ¸Ð¼Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²Ð° Ð²ÑÑÐµÐ´ÑÐµÐ³Ð¾ Ð´ÐµÐ±ÑÐ¸ÑÐ° Ð¿ÑÐ¸ ÑÐ°Ð·ÑÑÑÐµÐ½Ð¸Ð¸ Ð²Ð¾Ð»Ð¾ÐºÐ½Ð¸ÑÑÐ¾Ð¹ ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸ Ð² ÑÐ¾Ð´Ðµ ÑÐ°Ð·ÑÑÐ²Ð° ÐÐ¦Ð¢: â¢ Ð½Ðµ ÑÐºÑÐµÐ¿Ð»ÐµÐ½Ð½Ð¾Ð¹ ÑÐ¾Ð¼ÑÑÐ°Ð¼Ð¸; â¢ ÑÐºÑÐµÐ¿Ð»ÐµÐ½Ð½Ð¾Ð¹ ÑÐ¾Ð¼ÑÑÐ°Ð¼Ð¸; â¢ ÑÐºÑÐµÐ¿Ð»ÐµÐ½Ð½Ð¾Ð¹ ÑÐ¾Ð¼ÑÑÐ°Ð¼Ð¸, Ð½Ð° ÑÑÑÐ±Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð°Ñ Ñ DN &lt; 80, Ð½Ðµ Ð·Ð°Ð¼ÐµÐ½ÐµÐ½Ð½Ð¾Ð¹ Ð¾ÑÑÐ°Ð¶Ð°ÑÑÐµÐ¹ Ð¼ÐµÑÐ°Ð»Ð»Ð¸ÑÐµÑÐºÐ¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸ÐµÐ¹ ÑÐ¸Ð¿Ð° RMI. Ð§ÑÐµÐ·Ð¼ÐµÑÐ½Ð¾Ðµ ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²Ð¾ Ð¿Ð¾ÑÑÑÐ¿Ð°ÑÑÐµÐ³Ð¾ Ð´ÐµÐ±ÑÐ¸ÑÐ° Ð¼Ð¾Ð¶ÐµÑ Ð²ÑÐ·Ð²Ð°ÑÑ ÑÑÑÐ´ÑÐµÐ½Ð¸Ðµ ÑÐ°Ð±Ð¾ÑÑ Ð¸Ð»Ð¸ Ð¾ÑÑÐ°Ð½Ð¾Ð²ÐºÑ Ð½Ð°ÑÐ¾ÑÐ¾Ð² Ð¡ÐÐÐ, ÑÑÐ¾, Ð² ÑÐ²Ð¾Ñ Ð¾ÑÐµÑÐµÐ´Ñ, Ð¼Ð¾Ð¶ÐµÑ Ð¿ÑÐ¸Ð²ÐµÑÑÐ¸ Ðº Ð¿Ð¾ÑÐ»ÐµÐ´ÑÑÐ²Ð¸ÑÐ¼ Ð² Ð²Ð¸Ð´Ðµ ÑÑÑÐ´ÑÐµÐ½Ð¸Ñ ÑÐµÐ¿Ð»Ð¾Ð¾ÑÐ²Ð¾Ð´Ð° Ð¾Ñ Ð°ÐºÑÐ¸Ð²Ð½Ð¾Ð¹ Ð·Ð¾Ð½Ñ, Ð° Ð² ÐºÑÐ°Ð¹Ð½ÐµÐ¼ ÑÐ»ÑÑÐ°Ðµ Ðº ÑÐ°ÑÐ¿Ð»Ð°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸ Ð²ÑÑÐ¾Ð´Ñ ÑÐ¾Ð¿Ð»Ð¸Ð²Ð° Ñ Ð¿Ð¾ÑÐ»ÐµÐ´ÑÑÑÐµÐ¹ Ð¿ÑÐ¾ÐµÐºÑÐ½Ð¾Ð¹ Ð¸Ð»Ð¸ ÑÑÐ¶ÐµÐ»Ð¾Ð¹ Ð°Ð²Ð°ÑÐ¸ÐµÐ¹. ÐÐ¾Ð»ÑÑÐµÐ½Ð½ÑÐ¹ Ð² Ð¿ÑÐ¾ÑÐµÑÑÐµ ÑÐ°ÑÑÐµÑÐ¾Ð² Ð¾Ð±ÑÐµÐ¼ Ð´ÐµÐ±ÑÐ¸ÑÐ° Ð±ÑÐ» ÑÐ¾Ð¾ÑÐ½ÐµÑÐµÐ½ Ñ Ð¿Ð»Ð¾ÑÐ°Ð´ÑÑ ÑÐ¸Ð»ÑÑÑÑÑÑÐµÐ¹ Ð¿Ð¾Ð²ÐµÑÑÐ½Ð¾ÑÑÐ¸ ÑÐ¸Ð»ÑÑÑÐ° Ð¡ÐÐÐ, ÑÑÐ²ÐµÑÐ¶Ð´ÐµÐ½Ð½Ð¾Ð¹ Ð¿ÑÐ¾ÐµÐºÑÐ¾Ð¼. ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð° ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ ÑÐ¸Ð»ÑÑÑÐ° Ð¡ÐÐÐ (ÑÐ»Ð°Ð¼Ð¾ÐµÐ¼ÐºÐ¾ÑÑÑ) , Ñ. Ðµ. Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ðµ Ð¼Ð°ÑÑÑ Ð´ÐµÐ±ÑÐ¸ÑÐ° Ðº ÐµÐ´Ð¸Ð½Ð¸ÑÐµ Ð¿Ð»Ð¾ÑÐ°Ð´Ð¸ ÑÐ¸Ð»ÑÑÑÑÑÑÐµÐ¹ Ð¿Ð¾Ð²ÐµÑÑÐ½Ð¾ÑÑÐ¸, Ð´Ð»Ñ ÑÑÐµÑ Ð²ÑÑÐµÐ¿ÐµÑÐµÑÐ¸ÑÐ»ÐµÐ½Ð½ÑÑ Ð²Ð°ÑÐ¸Ð°Ð½ÑÐ¾Ð² ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸. ÐÐ¾ÐºÐ°Ð·Ð°Ð½Ð¾, Ð² ÐºÐ°ÐºÐ¾Ð¼ ÑÐ»ÑÑÐ°Ðµ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ ÑÐ¸Ð»ÑÑÑÐ° ÑÐ²Ð»ÑÐµÑÑÑ Ð¼Ð°ÐºÑÐ¸Ð¼Ð°Ð»ÑÐ½Ð¾Ð¹. Ð ÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐ°ÑÑÐµÑÐ¾Ð² Ð¼Ð¾Ð³ÑÑ Ð±ÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ñ Ð¿ÑÐ¸ Ð²ÑÐ±Ð¾ÑÐµ ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð¹ Ð¸Ð·Ð¾Ð»ÑÑÐ¸Ð¸ Ð´Ð»Ñ ÑÑÑÐ±Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¾Ð² ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ Ð´Ð¸Ð°Ð¼ÐµÑÑÐ¾Ð², Ð° ÑÐ°ÐºÐ¶Ðµ Ð²ÑÐ±Ð¾ÑÐ° ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸ Ð¸ ÑÐ°Ð·Ð¼ÐµÑÐ¾Ð² ÑÐ¸Ð»ÑÑÑÐ¾Ð², Ð¿ÑÐµÐ´Ð¾ÑÐ²ÑÐ°ÑÐ°ÑÑÐ¸Ñ Ð¿Ð¾Ð¿Ð°Ð´Ð°Ð½Ð¸Ðµ Ð´ÐµÐ±ÑÐ¸ÑÐ° Ð² ÑÐ¸ÑÑÐµÐ¼Ñ ÑÐµÑÐ¸ÑÐºÑÐ»ÑÑÐ¸Ð¸.
description: This paper demonstrates the impact of the use of innovative thermal insulation of the RMI type on safety systems in the event of a rupture of the main circulation pipeline during a loss of coolant accident at a nuclear power plant with VVER. Tasks solved during the work: 1. Description of the circuit diagram of the ECCS and sprinkler system. 2. Determination of sources of debris in civil defense. 3. Description of thermal insulation structures of the VNTI and RMI types. 4. Determination of the location of the MCP rupture, where the maximum amount of debris is formed. 5. Calculation of the debris yield during the destruction of VNTI during the rupture of the main circulation center. 6. Calculation of the debris yield during the destruction of the VNTI, strengthened with clamps, during the rupture of the main circulation center. 7. Determination of the residual amount of debris upon destruction of VNTI not replaced by RMI. 8. Rationale for using an ECCS filter. 9. Determination of the critical speed of a dispersed mixture in pipelines of various DNs during a rupture of the main circulation circuit. 10. Determination of the critical velocity of a dispersed mixture in the modes of small, medium and large leaks using the example of DN 600. The work was carried out on the basis of JSC ATOMENERGOPROEKT, where the initial data for calculations, materials for study and analysis were obtained. Based on the results of the work carried out, the values of the maximum amount of debris released during the destruction of fibrous thermal insulation during a MCP rupture were obtained: â¢ not reinforced with clamps; â¢ reinforced with clamps; â¢ reinforced with clamps, on pipelines with DN 80, not replaced with reflective metal insulation such as RMI. Excessive amounts of incoming debris can cause deterioration or shutdown of ECCS pumps, which, in turn, can lead to consequences in the form of deterioration of heat removal from the core, and in extreme cases, fuel melting and release, followed by a design basis or severe accident. The volume of debris obtained during the calculation process was correlated with the filtering surface area of the ECCS filter approved by the design. The efficiency of the ECCS filter (sludge capacity) k has been determined, i.e. the ratio of the mass of debris to a unit area of the filter surface for the three above-mentioned thermal insulation options. It is shown in which case the filter efficiency is maximum. The calculation results can be used when choosing thermal insulation for pipelines of various diameters, as well as choosing the design and size of filters that prevent debris from entering recirculation systems.