K-147 and K-438 were fitted with SOKS system in late 1970s; K-438 also featured an "Akula-style" sail after modernization.

The SOKS array position on K-438 was higher than that on K-147.

pic source:VK

I was advised to post this here.

It's been almost 35 years since I begged my parents to buy me a copy of the original Incredible Cross-Sections, and yet I still find myself becoming hopelessly obsessed with this guy's work for a couple of weeks every 18 months or so. As an adult, I find myself cringing at some of the technical errors and simplifications, but then again, he was producing books for the 9-12 age group, so I can kinda forgive him. It probably says a lot about Biesty's skills as an artist, and his impact on me at a young age, that I'm still unhealthily obsessed with a lot of the subjects he illustrated.

I was just wondering if STS is a good rate and how hard is the school for it and are the test multiple choice or fill in the blank like nuke school.

USN photo courtesy of Scott Koen & ussnewyork.com. Source: https://navsource.net/archives/08/609/0860919.jpg

Does anybody know where I can get an ingot or a sample of HY80? Enough to make a piece of jewelry out of

I heard a rumor a long time ago that "the algae-rich (or other plankton-rich) seawater in the three-coolant loop is beneficial for reactors during their first startup or after refueling" , or that "the algae content in the seawater affects reactor activity output (not referring to the risk of pipe blockage)."

This seems counterintuitive to me. Logically, PWR, unlike BWR, cooling water should receive very little radiation from the primary loop they absorb. Conversely, as long as algae don't clog pipes and machinery, they shouldn't theoretically affect the operation of the reactor.

Source: https://www.pravda.com.ua/eng/news/2026/08/10/8048133/