Valentin Khokhryakov

Valentin Fedorovich Khokhryakov (Валентин Федорович Хохряков; 22 June 1928 – 20 November 2023) was a Soviet and Russian scientist, internal dosimetry specialist, PhD in biology (1966), doctor of biology (1986), Professor (2006), awarded the USSR State Prize (1983), he was adjunct professor of the University of Utah (USA). He worked since 1957 at the Southern Urals Biophysics Institute. Khokhryakov was the author and coauthor of more than 170 research papers.

Career and research
In 1950, he graduated from Physics faculty of Leningrad State University. He was sent to Mayak PA where he worked as an engineer and senior engineer (1951-1953). At age 25 (1953) he became a faculty member in the "Evening Department #1" of Moscow Engineering Physics Institute (Ozersk Branch of Moscow Engineering Physics Institute), was one of the founders of the Department of General Physics, at the same time lecturing on dosimetry, general and theoretical physics.

Following invitation of G.D. Baisogolov he had started dosimetry and radiobiology scientific study as the Chairman of the Medical Sanitary Unit #71 Biophysics Laboratory (1957).

Valentin Khokhryakov obtained his PhD degree in March 1966.

In 1967, he was elected and became the Head of the first Internal Dosimetry Laboratory in USSR that was in Branch 1 of the Biophysics Institute. Valentin Khokhryakov had created the laboratory in a short time, participated in the development and creation of a hardware and methodological complex for measuring fission fragments and actinides in the human body in the Experimental Department and in Clinic of professional radiation pathology. During his work, he developed the basic principles and outlined ways to solve many problems of internal dosimetry. He created and developed a dosimetric control system for personnel of the entire nuclear industry. He developed a computational model based on an original system for estimating the solubility of aerosols of transuranic nuclides. In his doctoral thesis, he explored modelling biokinetic plutonium processes in human body (1986).

For many years he was a member of the editorial board of “Emergency medicine” (Russian: "Медицина катастроф"), till the end of his days he was a member of the editorial board of "Radiation Safety Issues" (Russian: "Вопросы радиационной безопасности").

5 PhD theses were generated under the guidance of Valentin Fedorovich.

Personal life and death
Khokhryakov lived in Ozyorsk, Chelyabinsk oblast, Russia. He died there on 20 November 2023, at the age of 95.

Awards and honours
Valentin Khokhryakov was awarded many honors, including a USSR State Prize (1983), medals "For Labour Valour", "Veteran of Labour", II Degree Medal of the Order "For Merit to the Fatherland" (1997), the badge "Excellent worker in healthcare", the badge "Veteran of nuclear energy and industry" (1997).

Publications
His h-index in the International bibliographic and reference database Scopus reaches 23. Some of the most cited publications:

1990s




2000s