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ASTM D7880/D7880M-22

(Test Method)

Standard Test Method for Determining Flow Rate of Water and Suspended Solids Retention from a Closed Geosynthetic Bag

Standard Test Method for Determining Flow Rate of Water and Suspended Solids Retention from a Closed Geosynthetic Bag

SIGNIFICANCE AND USE
5.1 This test method may be used as an aid to design geotextile container systems that contain fine-grained, high water content slurries such as dredged materials to meet special environmental or operational requirements. This test is often used to demonstrate the efficacy of geotextile dewatering to regulatory agencies in determining the amount of dredged material sediment passing through a geotextile and the flow rate for specific high water content materials.  
5.2 The designer can use this test method to assess the quantity of fine-grained dredged material sediment that may pass through the geotextile container into the environment.  
5.3 This test method is intended for evaluation of a specific material, as the results will depend on the specific high water content slurry and geotextile evaluated and the location of the geotextile container below or above water. It is recommended that the user or a design representative perform the test because geotextile manufacturers are not typically equipped to handle or test fine-grained slurries.  
5.4 This test method provides a means of evaluating geotextile containers with different dredged materials or high water content materials under various conditions. The number of times this test is repeated depends on the users and the test conditions.  
5.5 This test method may not simulate site conditions and the user is cautioned to carefully evaluate how the results are applied.
SCOPE
1.1 This test method is used to determine the flow rate of water and suspended solids through a geosynthetic permeable closed bag used to contain high water content slurry such as dredged material.  
1.2 The results for the water and sediment that pass through the geotextile bag are shown as liters of water per time period, and the percent total suspended solids in milligrams per liter or parts per million.  
1.3 The flow rate is the average rate of passage of a quantity of solids and water through the bag over a specific time period.  
1.4 This test method requires several pieces of specified equipment such as an integrated water sampler, analytical balance, geotextile bag, stand clear PVC pipes, testing frame, and clean containers to collect the decant water and a representative sample of high water content material from the proposed dredge area or slurry source.  
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Nov-2022
ICS
55.080 - Sacks. Bags
59.080.70 - Geotextiles
Technical Committee
D35 - Geosynthetics
Drafting Committee
D35.03 - Permeability and Filtration
Current Stage
Ref Project

Relations

Refers
ASTM D4354-12(2020) - Standard Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing
Effective Date
01-May-2020

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ASTM D7880/D7880M-22 - Standard Test Method for Determining Flow Rate of Water and Suspended Solids Retention from a Closed Geosynthetic BagASTM D7880/D7880M-22 - Standard Test Method for Determining Flow Rate of Water and Suspended Solids Retention from a Closed Geosynthetic Bag
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ASTM D7880/D7880M-22 - Standard Test Method for Determining Flow Rate of Water and Suspended Solids Retention from a Closed Geosynthetic Bag
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Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7880/D7880M − 22
Standard Test Method for
Determining Flow Rate of Water and Suspended Solids
1
Retention from a Closed Geosynthetic Bag
This standard is issued under the fixed designation D7880/D7880M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
1.1 This test method is used to determine the flow rate of 2.1 ASTM Standards:
water and suspended solids through a geosynthetic permeable D123 Terminology Relating to Textiles
closed bag used to contain high water content slurry such as D653 Terminology Relating to Soil, Rock, and Contained
dredged material. Fluids
D4354 Practice for Sampling of Geosynthetics and Rolled
1.2 The results for the water and sediment that pass through
Erosion Control Products (RECPs) for Testing
the geotextile bag are shown as liters of water per time period,
D4439 Terminology for Geosynthetics
and the percent total suspended solids in milligrams per liter or
parts per million.
3. Terminology
1.3 The flow rate is the average rate of passage of a quantity
3.1 Definitions:
of solids and water through the bag over a specific time period.
3.1.1 For definitions of other terms relating to
1.4 This test method requires several pieces of specified
geosynthetics, refer to Terminology D4439.
equipment such as an integrated water sampler, analytical 3.1.2 For definitions of textile terms, refer to Terminology
balance, geotextile bag, stand clear PVC pipes, testing frame,
D123.
and clean containers to collect the decant water and a repre- 3.1.3 For definitions of soil terms, refer to Terminology
sentative sample of high water content material from the D653.
proposed dredge area or slurry source. 3.1.4 high water content material, n—a slurry of water and
solids exhibiting the properties of a liquid, typically having a
1.5 The values stated in either SI units or inch-pound units
percent solids by weight smaller than 50 % (water content
are to be regarded separately as standard. The values stated in
greater than 100 %), and the size of the solid particles tend to
each system are not necessarily exact equivalents; therefore, to
be very fine grained (<0.064 mm).
ensure conformance with the standard, each system shall be
used independently of the other, and values from the two 3.2 Definitions of Terms Specific to This Standard:
systems shall not be combined.
3.2.1 flow rate, n—volume of fluid per unit time, expressed
as an average, that passes through a geotextile hanging bag.
1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.2.2 geotextile hanging bag, n—bag, tube, sock, or con-
responsibility of the user of this standard to establish appro- tainer designed and fabricated from a single or a combination
priate safety, health, and environmental practices and deter-
of layers of permeable geosynthetic to retain fine-grained
mine the applicability of regulatory limitations prior to use. particles such as found in dredged material, for subsequent
1.7 This international standard was developed in accor-
dewatering of the contained semi-fluid materials.
dance with internationally recognized principles on standard-
4. Summary of Test Method
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4.1 A geotextile bag is constructed by sewing one or more
mendations issued by the World Trade Organization Technical
layersofgeotextilestogethertoformaclosedcontainerwithan
Barriers to Trade (TBT) Committee.
entry clear PVC pipe providing entry to the bag. The bag will
support and contain a measured amount of saturated dredged
1
material or other high water content material.
This test method is under the jurisdiction of ASTM Committee D35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.03 on Perme-
ability and Filtration.
2
Current edition approved Dec. 1, 2022. Published December 2022. Originally For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approved in 2013. Last previous edition approved in 2013 as D7880/D7880M – 13, contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
which was withdrawn July 2022 and reinstated in December 2022. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D7880_D7880M-22. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C70
...

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Standard Guide for Monitoring the Neutron Exposure of LWR Reactor Pressure Vessels

SIGNIFICANCE AND USE
4.1 Regulatory Requirements—The USA Code of Federal Regulations (10CFR Part 50, Appendix H) requires the implementation of a reactor vessel materials surveillance program for all operating LWRs. Other countries have similar regulations. The purpose of the program is to (1) monitor changes in the fracture toughness properties of ferritic materials in the reactor vessel beltline6 resulting from exposure to neutron irradiation and the thermal environment, and (2) make use of the data obtained from surveillance programs to determine the conditions under which the vessel can be operated with adequate margins of safety throughout its service life. Practice E185, derived mechanical property data, and (r, θ, z) physics-dosimetry data (derived from the calculations and reactor cavity and surveillance capsule measurements (1) using physics-dosimetry standards) can be used together with information in Guide E900 and Refs. 4, 11-18 to provide a relation between property degradation and neutron exposure, commonly called a “trend curve.” To obtain this trend curve at all points in the pressure vessel wall requires that the selected trend curve be used together with the appropriate (r, θ, z) neutron field information derived by use of this guide to accomplish the necessary interpolations and extrapolations in space and time.  
4.2 Neutron Field Characterization—The tasks required to satisfy the second part of the objective of 4.1 are complex and are summarized in Practice E853. In doing this, it is necessary to describe the neutron field at selected (r, θ, z) points within the pressure vessel wall. The description can be either time dependent or time averaged over the reactor service period of interest. This description can best be obtained by combining neutron transport calculations with plant measurements such as reactor cavity (ex-vessel) and surveillance capsule or RPV cladding (in-vessel) measurements, benchmark irradiations of dosimeter sensor materials, and knowledge of th...
SCOPE
1.1 This guide establishes the means and frequency of monitoring the neutron exposure of the LWR reactor pressure vessel throughout its operating life.  
1.2 The physics-dosimetry relationships determined from this guide may be used to estimate reactor pressure vessel damage through the application of Practice E693 and Guide E900, using fast neutron fluence (E > 1.0 MeV and E > 0.1 MeV), displacements per atom (dpa), or damage-function-correlated exposure parameters as independent exposure variables. Supporting the application of these standards are the E853, E944, E1005, and E1018 standards, identified in 2.1.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Guide
    12 pages
    English language
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  • Guide
    12 pages
    English language
    sale 15% off