Radiation News

Superheated hydrothermal fluid flows upwards from an underwater volcano 2000m below the Gulf of California, Mexico (Photo: Schmidt Ocean Institute)

Scientists Find New Hydrothermal Field

, and even a discarded Christmas trees. This provided a stark juxtaposition next to the spectacular mineral structures and biodiversity.”The expedition was an unprecedented study of hydrothermal and gas plumes, with researchers using advanced technology including 4K deep-sea underwater cameras and radiation tracking devices, as well as sediment and fluid samplers working via a remotely operated vehicle, ROV SuBastian. To get a true measure of methane and other volatile substances existing in the deep sea, scientists need to capture the samples at the source. The scientists were able to do this with

Photo: Saab Seaeye

Nuclear-enabled ROV for Sellafield

reducing their exposure in this hazardous environment.“The reliability of the vehicle is key for the health of operators,” says Phil Toomey, Technical Manager at Sellafield Ltd, “as they must wash down the Tigers during service checks and launch and recovery.”Exposure to radiation for operators is carefully limited, and unplanned downtime will quickly exhaust their safe working period in any one year.The nuclear-enabled version of the Tiger, called Tiger-N, gathers and sorts meter-long, 15kg radioactive fuel bars for removal to long-term storage. This work can involve removing

 Applying Ecofix on the corroded areas of a rudder. (Photo: Subsea Industries)

Performing Coating Systems for Different Applications

family is Ecolast and was launched in 2016. This coating is ultraviolet (UV) light resistant and preserves its color while at the same time offering the corrosion and abrasion protection our coatings are known for.Regular coatings will quickly lose their original color when exposed to the ultraviolet radiation present in sunlight. This is problematic when colorfastness is required, as is the case in for example offshore wind farms.Ecolast is highly resistant against salt, ultraviolet radiation, waves or even ice. Mechanical damage to the coated surface is minimized. This is especially important for (semi-)sub

Launch of TRIAXUS from RV Investigator (courtesy of CSIRO)

Second MacArtney TRIAXUS ROTV for RV Investigator

and Depth Instrument (CTD)A Transmissometer to determine the excitation of the water medium to gauge clarity at ranging ocean depthsA Fluorometer to measure the parameters of Chlorophyll a to provide data on concentrations of algae in the water columnA PAR Sensor or Photosynthetically Active Radiation sensor to determine photon energy available for the photosynthesis processes in the water columnCustom sensor packages supported by the NEXUS fiber optic multiplexer and MMI (Man Machine Interface) mean the TRIAXUS can be programmed topside to perform various functions and undulations whilst being

(Photo: Tepco)

Water at Fukushima Site is Still Radioactive

under the Ministry of Economy, Trade and Industry, which is looking into ways to dispose of the water.A spokesman at Tepco confirmed the findings and the apology.A 9.0-magnitude quake and tsunami in March 2011 triggered meltdowns at three of the Fukushima Daiichi plant's six reactors, spewing radiation into the air, soil and ocean and forcing 160,000 residents to flee, many of whom have not returned.It was the world's worst nuclear disaster since Chernobyl 25 years earlier.Hundreds of deaths have been attributed to the chaos of evacuations during the crisis and to the hardship and trauma

(Credit: Rolls-Royce)

Research Vessels: The Fleet is In

Haakon will have a cruise speed of 15 knots and will be able to move on independently through ice thick up to one meter and with particular silence requirements to avoid disturbing the sea environment. The ship was built according to criteria ensuring minimum environmental impact and reduced radiation of noise underwater, so as to allow studies on fish and marine mammals. She will be able to carry out its oceanographic and hydrographic research activities in any area of operation. Kronprins Haakon will set sail for scientific expeditions starting in 2018.   LNG Fueled Research Ship for

Argentina’s new oceanographic and fishing research vessel 52m Victor Angelescu (Photo: Kongsberg)

Kongsberg Installs Marine Ecosystem Assessment Solution on Research Ship

operational technology. According to Adrian Madirolas, Head of the Hydroacoustic Lab at INIDEP, sea trials have already shown the high performance of Kongsberg’s integrated systems: “During the sea trials, the hydroacoustic results were exceptional. The low hydrodynamic noise level, low radiation noise and the perfect behaviour of air bubbles against the hull, allowed us to achieve high reliability in acoustic acquisition. In short, the co-operation between Kongsberg, Simrad Spain and Armón has worked perfectly." The Kongsberg equipment scope of supply includes: Simrad EK80

(Image: Precision Measurement Engineering)

New PAR Measurement Logger Launched

Designer and manufacturer of freshwater and oceanographic monitoring systems and instruments Precision Measurement Engineering has launched the new miniPAR Logger that logs photosynthetically active radiation (PAR), water temperature and tilt measurements. The completely submersible logger measures the amount of diffused sunlight through water, which can be beneficial for understanding nutrient loading, photosynthesis and algal blooms in natural waters up to 100 meters deep.    The miniPAR sensor is a Li-Cor Underwater Quantum Sensor, which measures PAR from all angles in one hemisphere.

Photo courtesy of Subsea Industries

Subsea Industries Introduces Ecolast Coating

;Ecolast, the latest member in its range of coating systems. This product is UltraViolet (UV) resistant and preserves its color while at the same time offering the corrosion and abrasion protection. Regular coatings will quickly lose their original color when exposed to the ultraviolet radiation present in sunlight, Subsea Industries said, noting that this is especially problematic when colorfastness is required, as  is the case for offshore wind farms, for example. The bottom part of the tower of wind turbines are all coated in the same regulated yellow. It is essential that the

NORsat-1 in EMC test at SFL. Two AIS antennas may be seen at the top, and four Langmuir probes off to the sides. The solar wings of the satellite are at the bottom. (Photo: Space Flight Laboratory)

Microsatellites Launched for Maritime Monitoring, Comms and Science

; The first satellite, dubbed NORsat-1 carries a state-of-the-art Automatic Identification System (AIS) receiver to acquire messages from maritime vessels, a set of Langmuir probes to study space plasma characteristics, and a Compact Lightweight Absolute Radiometer (CLARA) to measure total solar irradiation and variations over time. The payloads were provided by Kongsberg Seatex, the University of Oslo and the Physikalisch-Meterologisches Observatorium Davos World Radiation Center.    The satellite is approximately 15 kilograms with main body dimensions of 20x30x40cm. NORsat-1 utilizes

Photo: Jawaharlal Nehru Port Trust

JNPT Gets Radiological Detection Equipment at Exit Gates

.  Out of these 11  are at North Gate Complex, 3  at the South Gate Complex, 7  at Central Gate Complex and 7  at Railway Gates, in addition to the above one Limb monitor, each has been installed at South Gate and NSICT Gate.  10  Isotope Identifier, 10  Portable Radiation Detector and 10  Radiation Monitors which are hand held devices forming part of total system.   Six   local control station have been commissioned at individual gates and have now been successfully connected through optic fibre to the Main Control Station at the North Gate Complex

Marine Technology Magazine Cover May 2019 - Underwater Defense Technology

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