Question: What was the first of these types in which was supervised by Walter Zinn of the Manhattan Project?

Context paragraphs:
B Reactor: The B Reactor at the Hanford Site, near Richland, Washington, was the first large-scale nuclear reactor ever built.  The project was commissioned to produce plutonium-239 by neutron activation as part of the Manhattan Project, the United States nuclear weapons development program during World War II.  The B reactor was fueled with metallic natural uranium, graphite moderated, and water-cooled.  It has been designated a U.S. National Historic Landmark since August 19, 2008 and in July 2011 the National Park Service recommended that the B Reactor be included in the Manhattan Project National Historical Park commemorating the Manhattan Project.  Visitors can take a tour of the reactor by advance reservation.

British hydrogen bomb programme: The British hydrogen bomb programme was the ultimately successful British effort to develop hydrogen bombs between 1952 and 1958.  During the early part of the Second World War, Britain had a nuclear weapons project, codenamed Tube Alloys.  At the Quebec Conference in August 1943, the Prime Minister of the United Kingdom, Winston Churchill and the President of the United States, Franklin Roosevelt, signed the Quebec Agreement, which merged it with the American Manhattan Project, and many of Britain's top scientists participated in the British contribution to the Manhattan Project.  The British government trusted that America would share nuclear technology, which it considered to be a joint discovery, but the United States Atomic Energy Act of 1946 (also known as the McMahon Act) ended technical cooperation.  Fearing a resurgence of American isolationism, and Britain losing its great power status, the British government resumed its own development effort, which was codenamed "High Explosive Research".

Ames Project: The Ames Project was a research and development project that was part of the larger Manhattan Project to build the first atomic bombs during World War II.  It was founded by Frank Spedding from Iowa State College in Ames, Iowa as an offshoot of the Metallurgical Laboratory at the University of Chicago devoted to chemistry and metallurgy, but became a separate project in its own right.  The Ames Project developed the Ames Process, a method for preparing pure uranium metal that the Manhattan Project needed for its atomic bombs and nuclear reactors. Between 1942 and 1945, it produced over 1000 ST of uranium metal.  It also developed methods of preparing and casting thorium, cerium and beryllium.  In October 1945 Iowa State College received the Army-Navy "E" Award for Excellence in Production, an award usually only given to industrial organizations.  In 1947 it became the Ames Laboratory, a national laboratory under the Atomic Energy Commission.

Manhattan Project: The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons.  It was led by the United States with the support of the United Kingdom and Canada.  From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers.  Nuclear physicist Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the actual bombs.  The Army component of the project was designated the Manhattan District; "Manhattan" gradually superseded the official codename, Development of Substitute Materials, for the entire project.  Along the way, the project absorbed its earlier British counterpart, Tube Alloys.  The Manhattan Project began modestly in 1939, but grew to employ more than 130,000 people and cost nearly US $2 billion (about $ in 2016 dollars).  Over 90% of the cost was for building factories and to produce fissile material, with less than 10% for development and production of the weapons.  Research and production took place at more than 30 sites across the United States, the United Kingdom, and Canada.

Walter Zinn: Walter Henry Zinn (December 10, 1906 – February 14, 2000) was a nuclear physicist who was the first director of the Argonne National Laboratory from 1946 to 1956.  He worked at the Manhattan Project's Metallurgical Laboratory during World War II, and supervised the construction of Chicago Pile-1, the world’s first nuclear reactor, which went critical on December 2, 1942, at the University of Chicago.  At Argonne he designed and built several new reactors, including Experimental Breeder Reactor I, the first nuclear reactor to produce electric power, which went live on December 20, 1951.

Chicago Pile-1: Chicago Pile-1 (CP-1), was the world's first artificial nuclear reactor.  Its construction was part of the Manhattan Project, the Allied effort to create atomic bombs during World War II.  It was built by the Manhattan Project's Metallurgical Laboratory at the University of Chicago, under the west viewing stands of the original Stagg Field.  The first human-made self-sustaining nuclear chain reaction was initiated in CP-1 on 2 December 1942, under the supervision of Enrico Fermi, who described the apparatus as "a crude pile of black bricks and wooden timbers".

Manhattan Project (song): "Manhattan Project" is a 1985 song by Canadian progressive rock band Rush, named for the WWII project that created the first atomic bomb.  The song appeared on Rush's eleventh studio album "Power Windows" in 1985.  "Manhattan Project" is the third track on the album and clocks in at 5:07.  It was released as a single (also in 1985) and reached #10 on the U.S. Mainstream Rock Chart.

Journal of Business Logistics: The Journal of Business Logistics is a peer-reviewed academic journal published by Wiley-Blackwell on behalf of the Council of Supply Chain Management Professionals, covering research and best practices in logistics and supply chain management.  As of late 2015, its editors-in-chief are Thomas J. Goldsby and Walter Zinn, both of The Ohio State University.  According to the "Journal Citation Reports", its 2011 impact factor is 2.352, ranking it 32nd out of 166 journals in the category "Management".

Armed Forces Special Weapons Project: The Armed Forces Special Weapons Project (AFSWP) was a United States military agency responsible for those aspects of nuclear weapons remaining under military control after the Manhattan Project was succeeded by the Atomic Energy Commission on 1 January 1947.  These responsibilities included the maintenance, storage, surveillance, security and handling of nuclear weapons, as well as supporting nuclear testing.  The AFSWP was a joint organization, staffed by the United States Army, United States Navy and United States Air Force; its chief was supported by deputies from the other two services.  Major General Leslie R. Groves, the former head of the Manhattan Project, was its first chief.

Timeline of the Manhattan Project: The Manhattan Project was a research and development project that produced the first atomic bombs during World War II.  It was led by the United States with the support of the United Kingdom and Canada.  From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the US Army Corps of Engineers.  The Army component of the project was designated the Manhattan District; "Manhattan" gradually became the codename for the entire project.  Along the way, the project absorbed its earlier British counterpart, Tube Alloys.  The Manhattan Project began modestly in 1939, but grew to employ more than 130,000 people and cost nearly US$2 billion (about $ in 2016 dollars).  Over 90% of the cost was for building factories and producing the fissionable materials, with less than 10% for development and production of the weapons.

Supporting paragraphs: Walter Zinn Chicago Pile-1
Answer: nuclear reactor