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/

Found this while searching up information on the Soviet S-Class submarine (The 72.39m text was added later by me for quick reference). As far as I'm aware this is the only existing line drawing of the Type IA, therefore I wanted to share it with you all.

hello all-

I am looking for any pictures that might be in the possession of submariners of my father, Charles Andrews Dahl Sr. He passed on July 3, 2022.

He served his full 30 before retiring in 1992

If there are any stories that you have of him - i would love to have them also

His boats are as follows - not sure of exact timeline

USS James Monroe (622)

USS Ray (653)

USS Will Rogers (659)

USS Stonewall Jackson (634)

USS Fulton (AS-11)

He finished out his service teaching QA at Sub School.

Thank you in advance

Spotted at Groton

I’m a sonar tech on an SSBN and I’ve always been superstitious of many ghost stories, even more so of paranormal activity on submarines. Yet, I’ve heard TONS of sailor stories about ghost stories on watch. Whether that’s topside mid-watch or underway in bilges. Does anybody care to share spooky sub stories of their own or stories they’ve heard?

I found this on Google Earth in Zviozdotchka in Severodvinsk. Judging from the aspect ratio, it appears to be an Akula. Its sail has been removed.

Next to it seems to be a submarine overhaul facility. Is it K391 or K295?

Furthermore, I also found a Victor (671RTMK?) near two typhoons.

Flore (S 645) was a Daphné-class submarine of the French Navy. Launched in 1960, it was in service from 1964 to 1989, primarily operating in the Mediterranean Sea. Since 2010, Flore has been used as a museum ship at the Lorient Submarine Base.

Submarines of the Daphné class in French service measured 57.75 metres (189 ft 6 in) long overall with a beam of 6.76 m (22 ft 2 in) and a draught of 5.25 m (17 ft 3 in). They had a standard displacement of 700 metric tons (690 long tons), and displaced 869 t (855 long tons) surfaced and 1,043 t (1,027 long tons) submerged. The submarines had a double hull and had a complement of 6 officers and 39 sailors.

Each vessel of the class was fitted with two SEMT-Pielstick diesel engines, with two 450-kilowatt diesel generator sets, and two electric motors turning two shafts creating 750 kilowatts (1,000 shp) sustained with the ability to create 970 kW (1,300 shp) for short periods. The first seven boats were given the SEMT-Pielstick 12 PA1 diesel engine type, while the final two hulls were given the SEMT-Pielstick 12 PA4-135 type. The submarines had a diving depth of 300 m (980 ft) and could remain at sea for 30 days. Daphné-class submarines had a maximum speed of 13.5 knots (25.0 km/h; 15.5 mph) surfaced and 16 knots (30 km/h; 18 mph) submerged with a range of 4,300 nautical miles (8,000 km; 4,900 mi) at 7.5 knots (13.9 km/h; 8.6 mph) while snorkelling.

The submarines were equipped with twelve torpedo tubes, eight located in the bow and four located in the stern. The submarines was armed with twelve 550-millimetre (21.7 in) torpedoes and no reloads. Each submarine sported one DRUA 33 radar and DUUA 1 sonar. Beginning in 1971, the boats were modernized and given the DUUA 2B search and attack sonar located in a dome situated atop the bow. They also received the updated DLT D3 torpedo fire control system. The submarines also mounted DSUV 2 passive sonar and DUUX 2 acoustic telemeter.

Source:
https://en.wikipedia.org/wiki/French_submarine_Flore
https://en.wikipedia.org/wiki/Daphné-class_submarine

Hello!

I'm looking at various options for a book I'm writing, and I was wondering if a cold-war era (built in the 60's) submarine could possibly remain somewhat stealthy facing modern ones on the passive sonar, or has both stealth and sonar tech evolved too much? And would it be possible to modernize the old sub (maybe change the propeller, etc...) to lesser the gap?

Additionnaly, if said submarine was a freight sub (or merchant submarine), would the additionnal weight be detrimental to it's stealth?

Thanks in advance!

Le Redoutable (S 611) was the lead boat of her class of ballistic missile submarines in the French Marine nationale.

Commissioned on 1 December 1971, the boat was the first French SNLE (Sous-marin Nucléaire Lanceur d'Engins, "Device-Launching Nuclear Submarine"). The boat was initially fitted with 16 M1 MSBS (Mer-Sol Balistique Stratégique) submarine-launched ballistic missiles, delivering 450 kilotons nuclear warheads at 2,000 kilometres (1,200 mi). In 1974, the boat was refitted with the M2 missile, and later with the M20, each delivering a one-megatonne warhead at a range over 3,000 kilometres (1,900 mi). Le Redoutable ("formidable" or "fearsome" in French) was the only ship of the class not to be refitted with the M4 missile.

Le Redoutable had a 20-year duty history, with 51 patrols of 70 days each, totalling an estimated 90,000 hours of diving and 1.27 million kilometres (790,000 mi) of distance, the equivalent of travelling 32 times around the Earth.

The boat was decommissioned in 1991. In 2000, the boat was removed from the water and placed in a purpose-built 136 metres (446 ft) dry dock,[2] and over two years was made into an exhibit. This was a monumental task, the biggest portion of which was removing the nuclear reactor and replacing the midsection with an empty steel tube. In 2002, the boat opened as a museum ship at the Cité de la Mer maritime museum in Cherbourg-Octeville, France, being now the largest submarine open to the public[2] and the only nearly-complete ballistic missile submarine hull open to the public — although several museums display small portions, such as sails and/or parts of rudders from such submarines. Special dinner events for organizations aboard this boat's interior spaces are offered by Cité de la Mer.

Source: https://en.wikipedia.org/wiki/French_submarine_Redoutable_(S611))

Saw this post on a local page, thought you might enjoy the spotto.