NOVELTY - Hydrogen manufacturing apparatus has nuclear reactor (11) to generate neutron beams and gamma rays. A nuclear power pressure vessel (12) containing water, is arranged on the circumference of nuclear reactor to generate hydrogen. The hydrogen extraction apparatus (15) extracts the generated hydrogen.    USE - In methanol manufacturing apparatus and atomic energy apparatus.    ADVANTAGE - Carbon dioxide ejected from heat engine is utilized to manufacture methanol and ejection of carbondioxide to environment is eliminated. Large amount of hydrogen is manufactured cheaply. The hydrogen obtained is injected into piping of atomic energy apparatus which prevents stress conversion cracking (SCC) of piping.    DETAILED DESCRIPTION - The reaction core of nuclear reactor, spent fuel or a pulse mold nuclear reactor is used for generating radiation. The reactor pressure vessel containing water, is arranged in the circumference of nuclear reactor. The water container is arranged such that water contacts the reactor directly using the reactor core as a solid ceramic fuel cell. The calandria tank of heavy water type is also used as water container. The hydrogen generated is extracted by hydrogen extraction apparatus which has molecular sieve with pore size of 0.3 nm or less formed by carbon or zeolite. Hydrogen extraction apparatus is connected to the exhaust type turbine of boiling water type reactor and has hydrogen occlusion alloy. INDEPENDENT CLAIMS are also included for the following:    (1) Methanol manufacturing apparatus has hydrogen extraction apparatus with molecular sieve made of zeolite which absorbs carbondioxide exhausted from heat engine. Carbon dioxide is recovered by circulating heat engine exhaust through separation wall made pores inorganic material. The apparatus has reaction container where carbondioxide and hydrogen are made to react to form methanol; and    (2) Atomic energy apparatus introduces hydrogen manufactured by the hydrogen manufacturing apparatus into cooling type boiling water reactor.    DESCRIPTION OF DRAWING(S) - The figure shows systematic diagram of hydrogen manufacturing apparatus. The figure contains non-English text.    Nuclear reactor (11)    Nuclear power pressure vessel (12)    Hydrogen extraction apparatus (15)