Quantcast Table 2.5. Allotropic Forms of Plutonium Metal(a) - doe-std-1128-98_ch10025

 

Click here to make tpub.com your Home Page

Page Title: Table 2.5. Allotropic Forms of Plutonium Metal(a)
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
Figure 2.3 Neutron Energy Spectra of Plutonium-Beryllium and Plutonium-Boron Neutron Sources Compared with a Fission Source
Up
DOE Standard Guide of Good Practices for Occupational Radiological Protection In Plutonium Facilities
Next
Plutonium Alloys - doe-std-1128-98_ch10026


DOE-STD-1128-98
Table 2.5. Allotropic Forms of Plutonium Metal(a)
Phase
Stability Range C
Density g/cm3(b)
α
Stable below 115
19.86
β
~115 to 200
17.70
λ
~200 to 310
17.14
σ
310 to 452
15.92
σ'
452 to 480
16
480 to 640
16.51
(a)
Wick, 1967, p. 34.
(b)
Theoretical X-ray density. The actual density is slightly lower due to crystal
lattice imperfection.
Plutonium is an active metal. In moist air or moist argon, the metal oxidizes
rapidly, producing a mixture of oxides and hydrides (Haschke, 1992). If the
metal is exposed long enough, an olive-green powdery surface coating of PuO2
is formed. With this coating, the metal is pyrophoric, so plutonium metal is
usually handled in an inert, dry atmosphere of nitrogen or argon. Oxygen
retards the effects of moisture and acts as a passivating agent (Raynor and
Sackman, 1963). For a description of the storage hazards that the oxidation of
plutonium metal creates, see Section 2.6.3.1, "Oxidation of Plutonium." A
comprehensive treatment of the oxidation of plutonium, the properties of its
oxides, oxide growth, and oxidation kinetics was reviewed by Colmenares
(1975).
Plutonium metal also reacts with most common gases at elevated temperatures.
Plutonium metal is rapidly dissolved by HCl, HBr, 72% HCl04, 85% H3PO4,
concentrated CCl3COOH (trichloroacetic acid), sulfamic acid, and boiling
concentrated HNO3 in the presence of 0.005M HF. The metal reacts slowly
with water, dilute sulfuric acid, and dilute acetic acid. There is no reaction with
the metal in pure HNO3 at any concentration, with concentrated acetic acid, nor
with dilute sodium hydroxide.
2-11


Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc.