ISO 11711-2:2022 船舶および海洋技術 — 水生迷惑種 — Part 2: バラスト水サンプルの収集と取り扱い | ページ 6

3.1

absolute pore size

pore size based on empirical measurements of the pores in a filter (3.9)

3.2

capture efficiency

measurement of organism retention in a sample collection apparatus, typically expressed as a percentage

3.3

closed loop configuration

sampling arrangement that returns the filtered water to the ballast discharge pipe

3.4

closed system

sample collection device (3.23) that houses a filter (3.9) within a sealable container having inlet and outlet connections

Note 1 to entry: The filter used to concentrate organisms is typically made of metal or nylon mesh (see 6.1.3).

Note 2 to entry: A closed system can be operated in either open loop configuration (3.19) or closed loop configuration (3.3) .

3.5

collection container

container used to obtain, hold, and transport water samples

3.6

concentration factor

ratio of filtrate (3.11) volume to filtrand (3.10) volume

3.7

depth filtration

filtration method where particles are captured within the filter media rather than on the surface of the filter (3.9)

3.8

effective surface area

filter (3.9) area available for filtration

3.9

filter

barrier that is introduced to retain organisms and particles of a given size while smaller particles are allowed to pass through

3.10

filtrand

concentrated sample, used in whole or in part for analysis, that is collected during the concentration process

3.11

filtrate

water that passes through a filter (3.9)

3.12

filtration velocity

flow velocity (3.13) through filter (3.9) pores

Note 1 to entry: In SI units, this parameter is expressed in metres per second.

3.13

flow velocity

distance travelled by a fluid per unit time (independent of any pipe dimensions)

Note 1 to entry: In SI units, this parameter is expressed in metres per second.

3.14

hot-tap sample probe assembly

sample probe assembly that can be installed into and removed from a water-filled, pressurized ballast pipe

3.15

maximum allowable working pressure

MAWP

maximum pressure that the weakest component in a pressurized system is designed to withstand

3.16

measurement requirement

specific requirement needed to support the purpose of the measurement, including sample timing, volume, duration, a specific ballast tank or sampling location, and acceptable measurement uncertainty

Note 1 to entry: See 4.3.2.

3.17

nominal pore size

pore size specified by the filter (3.9) manufacturer to identify the size of particles typically retained by the filter

3.18

open loop configuration

sampling arrangement that returns the filtered water to an unpressurized container (e.g. a bilge)

3.19

open system

sample collection device (3.24) that houses a filter (3.9) within an open container, e.g. an open tank with a plankton net (3.21)

3.20

operation, maintenance, and safety manual

OMSM

reference manual supplied by the manufacturer for a ballast water management systems (BWMS) product that identifies factors that affect the operation of the BWMS, including any warm-up or other requirements that must be completed to achieve operational stability

Note 1 to entry: The OMSM specifies what constitutes stable operating conditions for the BWMS, factors that can affect operating conditions, and any adjustments required to reach or to maintain a stable operating condition.

3.21

plankton net

3.22

representative sampling

sampling methodology that obtains concentrations and compositions of constituent materials and organisms that are in the proportions and physical state of the source volume of interest

Note 1 to entry: In the case of ballast water sampling, representative conditions are considered under fully turbulent flow, where an appropriate sited sample probe obtains a sample at a flow velocity (3.13) of 0,25 to 1 times the flow velocity of the water in the ballast discharge pipe, thus sample flow is isokinetic or sub-isokinetic ^{[4], [5]}.

3.23

sample collection device

device that can concentrate and collect the larger class of organisms [via a filter (3.9) or plankton net (3.21) ], collect a whole water sample, or both

Note 1 to entry: A sample collection device can consist of multiple individual systems, e.g. multiple closed systems (3.4) , each housing a filter.

[SOURCE:ISO 11711-1:2019, 3.13, modified — Note 1 to entry has been added]

3.24

sample collection team

personnel responsible for setting up the sample collection device (3.23) , collecting and retrieving the ballast water samples

3.25

sample collection device isolation valve

full port valve used to isolate the sample collection device (3.23) from the ballast discharge pipe

3.26

sample flow control valve

valve used to regulate the sample flow rate

3.27

sample hold time

duration between end of sample collection and start of analysis

3.28

sample probe bend radius

radius of the curvature in the sample probe, as measured at the centreline

3.29

sample probe insertion length

distance from the diametric centre of the sample probe entrance to the sample port access flange when installed into the ballast discharge pipe

3.30

sample probe opening

entrance through which the water from the ballast discharge pipe enters the sample probe

3.31

test cycle

testing iteration (including uptake, treatment, holding and discharge, as appropriate) under a given set of requirements used to establish the ability of a ballast water management system (BWMS) to meet the set discharge standards

[SOURCE:IMO MEPC.300(72), BWMS Code, 3.15]

3.32

testing organization

company, corporation, firm, enterprise, authority or institution, or part or combination thereof, whether incorporated or not, public or private, that has its own functions and administration, that conducts the testing of ballast water

[SOURCE:IEC 62507-1:2010, 3.17]

3.33

volumetric flow rate

volume of fluid passing per unit time, calculated from flow velocity (3.13) and cross section area

Note 1 to entry: In ballast water operations, this parameter is typically expressed in cubic metres per hour.

Note 2 to entry: In SI units, this parameter is expressed in cubic metres per second.