Thursday, June 29, 2006

 

Operation testing came to the first checkpoint

JNFL president Isami Kojima announced at a press conferrence on June 28 that the Rokkasho reprocessing plant finished the designed test items of the first step of active testing. The test items were conducted at shearing, dissolving, separation, and refining processes before June 26. Here inafter, the word "first step" means 88-days-tests from March 31 to June 26.

Following to the announcement, JNFL opened its "Interim active testing reoport -part I-" on July 7. The report, which was sent to the ministry of economy's nuclear safety agency on the same day, says most of the process results have achieved the expected performance levels, and radiation control and radioactive waste treatment were done safely and in an appropiate manner. The report will be discussed at the nuclear safety agency's advisory council on July 14 and the results will be brought to the Governor Mimura.

Some of the tests results in the report are as follows.

Liuqid radioactive wastes discharge into the sea (Bq/1st step)
H-3 1.3E13
I-129 ND*
I-131 ND*
Other Alfa-ray nuclides ND*
Other non-Alfa nuclides ND*

* ND=Not Detected

Gaseous radioactive wastes release into the atomsphere (Bq/1st step)
Kr-85 2.9E15
H-3 1.2E12
C-14 1.9E11
I-129 3.8E7
I-131 ND
Other Alfa-ray nuclides ND
Other non-Alfa nuclides ND

Radiation Dose (number of personnel/1st step)
less than 0.1 mSv 3172
0.1 mSv ~ 1.0 mSv 2
1.0 mSv ~ 5.0 mSv 0
more than 5.0 mSv 0 (total personnel in service = 3174)

Radiation Dose of women (number of personnel/1st step)
less than 0.1 mSv 40
0.1 mSv ~ 1.0 mSv 0
1.0 mSv ~ 2.0 mSv 0
more than 2.0 mSv 0 (total personnel in service = 40)

Wednesday, June 28, 2006

 

Spent fuels arrived

On June 27, JNFL announced it had recieved 35 tons spent fuels in total from nuclear power stations of Mihama of Kansai Electric Power co. and Genkai of Kyushu Electric Power co.

 

Furukawa elected again for Rokkasho-mura village mayor

Kenji Furukawa, the incumbent mayor of Rokkasho-mura village, won the election held on June 25, defeating Yoko Umekita, an anti-nuclear activist, by 5,393 to 374.

Sunday, June 18, 2006

 

Shredding spent fuels progress

JNFL announced its reprocessing plant had been shredded another 31 PWR spent fuels by June 11.

 

Reduction agent leakage repaired

JNFL announced May 29 that the place of the leakage of reduction agent found on May 17 was a pinhall at a joint part of the reduction agent supplying line. It turned out that one "T-shape joint" had a undesigned materials inside, then nitric acid corroded and made the pinhall. All the related T-shape joint parts were replaced.

Friday, June 02, 2006

 

JNFL reported monthly plant operation results to the Governor

Wednesday JNFL reported to Aomori Prefecture Governor of the reprocessing plant operation as of April 30. The monthly report, which is required by the environmental protection agreement signed by JNFL, the governor and Rokkasho-mura Village mayor, covers radioactive waste management, number of spent fuels being stored and reprocessed and stock of products (U and Pu).
According to the report, gaseous and liquid radioactive wastes released into the environment during the April were as follows.

Liuqid radioactive wastes (Bq/month)
H-3 1.7E8
I-129 ND*
I-131 ND*
Other Alfa-ray nuclides ND*
Other non-Alfa nuclides ND*

Gaseous radioactive wastes (Bq/month)
Kr-85 1.8E14
H-3 1.5E11
C-14 ND*
I-129 1.7E6
I-131 ND*
Other Alfa-ray nuclides ND*
Other non-Alfa nuclides ND*

* ND=Not Detected


Thursday, June 01, 2006

 

Spent fuel and low-level waste carried into Rokkasho

JNFL recieved spent nuclear fuels and low-level waste drums since last week.
By May 25, 42 spent fuels from Tomari Nuclear Power Station of Hokkaido
Electric Power co. and 56 SFs from Genkai Nuclear Power Station owned by
Kyushu Electric Power co. were shipped and transported into the spent fuel
storage pool of the reprocessing plant.
And by May 30, 1,240 drums from Mihama Nuclear Power Station of Kansai
Electric Power co. were carried into JNFL's low-level radioactive waste
disposal center in Rokkasho-mura village.


Friday, May 19, 2006

 

Reduction agent leakage was found in the refining building

JNFL announced May 18 that small amount of leakage of reduction agent liquid
was found in its refining building of the spent-fuel reprocessing plant. The
amount was seven litres and had slight level of radioactive materials. The
leakege was stopped and was about to be recovered properly at the time of
the announcement. No environmental impacts nor occupatioal dose was
observed.


Wednesday, May 17, 2006

 

More fuels shredded

JNFL announced it had additionally shredded six spent fuels by May 14 evening, eight by May 15 and four by May 16. In total, 36 nuclear fuels burnt in pressurised light-water reactors have been shredded and dissolved since the active testing of the plant started on March 31.


 

Low-level wastes will arrive May 29-30

JNFL announced May 12 that its low-level waste disposal division in Rokkasho-mura village would recieve low-level radioactive wastes sealed in 1,240 drums and shipped from Kansai EPCo's Mihama nuclear power station on May 29 and 30.


Saturday, May 13, 2006

 

High court ruled Rokkasho uranium enrichment plant is safe to operate

The Sendai High Court on May 8th rejected requests by a group of citizens, noting the government's safety examination was "legitimate" and "flawless."The group has argued that government permits to the operation of the Rokkasho uranium enrichment plant should be revoked because the facility was vulnerable to quakes, plane crashes, and they would lead to a severe nuclear accidents.
The the enrichment plant started operation in 1992, the group filed the suit to the Aomori District Court in 1989 against the government permission issued in the previous year.
The uranium enrichment plant currently has the operating capacity of 450 tons SWU.


 

Another ten fuels reprocessed

JNFL announced it shredded and dissolved another ten nuclear fuels by May
7th. The total amount of spent nuclear fuels shredded at the reprocessing
plant became 18 PWR (pressurised water reactor) fuels.
Despite several troubles including failures in starting an electric motor at
the refining building, the reprocessing process is functioning properly.


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