[2] Radiant served with the 10th Destroyer Flotilla of Harwich Force from April 1917 until February 1919.

After the First World War, she was briefly assigned to the 4th Destroyer Flotilla of the Home Fleet before paying off and being laid up in reserve as part of the Nore Command until sold.

It is believed that in order to finance her acquisition King Rama VI and other senior figures donated personally to the finance fund, making this the first publication donation of money to procure a warship in Thailand.

[8] On 29 January 1943, the submarine USS Trout launched three torpedoes at a destroyer believed to be Phra Ruang and watched each run true to the target.

She was used as a training ship toward the end of her career, removed from the effective list in 1957,[9] and stricken in 1959.