Free 1 yr Gold Membership

[Rennhack]

Free 1 year Gold membership to the first correct answer to this question:

What is the dose rate of a 402.84 Curie Co-60 source  @ 3', after 16 months.

[jonesin]

563.44 R/hr

[capgun2]

521 R/Hr at 3 feet. If you put a lead blanket on it the dose rate will be 157 R/HR. What site are you working at?

[Radstalker]

564 R/hr

[milo124]

564.44 R/hr @ 3 ft

I like this. 

[Rennhack]

564.44 R/hr @ 3 ft

I like this. 

Thank you for participating. I gave the 1 year free membership to the first three responders.  I'll have another question next week.

[Rennhack]

I also gave everyone karma that participated.

[GLW]

Free 1 year Gold membership to the first correct answer to this question:

What is the dose rate of a 402.84 Curie Co-60 source  @ 3', after 16 months.

Is it 402.84 curies before the 16 months or is it 402.84 curies after 16 months?

You can only get the most correct answer if you make the same assumption as the question's author.

[Rennhack]

Is it 402.84 curies before the 16 months or is it 402.84 curies after 16 months?
You can only get the most correct answer if you make the same assumption as the question's author.

It is 402.84 prior to decaying for 16 months.

A_o = 402.84 Ci

The only thing even remotely 'challenging' about this exercise is that I didn't supply the T_1/2 (or, I suppose, the decay energy), but it's such a common element in our industry, I assumed no one would need it. -- And I was right.

[Radstalker]

Thank you...

[Rennhack]

Thank you...

You are welcome.  Now give some karma, and participate in the gold members only area!

[Marlin]

You are welcome.  Now give some karma, and participate in the gold members only area!

Enter PolySci carefully "Here be Dragons"   

[Rennhack]

My answers:

((403*15/9)*(0.5^((16/12)/5.3)))=564.2 R/hr

or

((402.84*(6*((0.34693*0.000076)+(0.82606*0.000076)+(1.173237*0.999736)+(1.332501*0.999856)+(2.15857*0.0000111)+(2.5*0.00000002))))/(3^2))*(0.5^((16/12)/5.2714))=564.635214801879 R/hr

Of course 6CEN is in R/hr is not Rem/hr, and we need the dose rate so we have to convert it to Rem...

Roentgen and Rem (Roentgen Equivalent Man) are often used interchangeably. If you are curious; 1 Roentgen is 87 ergs/g in air for photons greater than 10 keV and less than 3 MeV, which is about 92 to 96 ergs/g in people (depends on if you are talking about bone, muscle or fat).  The Rem is 100 ergs/gram in human tissue for photons of any energy. So 1 R Gamma is roughly 0.96 Rem Gamma.

542 Rem/Hr

Capgun, where the heck did you get your number?

[Rennhack]

Since Cap gun was farther off than the rest, (I would have taken anything from 563-565 R, but hoped for Rem), I'm going to give Capgun 6 months, and 6 months to milo, since he was technically the 3rd 'correct' answer.

[milo124]

  

[radbrat]

Ever been somewhere that has used a 400 Ci source?

[capgun2]

I used the gamma constant from the Rad. Health Handbook for C0-60 on page 131 of the RHH.  

[GLW]

My answers:

((403*15/9)*(0.5^((16/12)/5.3)))=564.2 R/hr

or

((402.84*(6*((0.34693*0.000076)+(0.82606*0.000076)+(1.173237*0.999736)+(1.332501*0.999856)+(2.15857*0.0000111)+(2.5*0.00000002))))/(3^2))*(0.5^((16/12)/5.2714))=564.635214801879 R/hr

Of course 6CEN is in R/hr is not Rem/hr, and we need the dose rate so we have to convert it to Rem...

542 Rem/Hr

Capgun, where the heck did you get your number?

my favorite,....

http://www.radprocalculator.com/

[Rennhack]

my favorite,....http://www.radprocalculator.com/

Using Ray's calculator I got: 523.3 R/hr @3ft

However, if you ask it for Rem/hr you get 459 Rem/hr @ 3ft

Apparently Ray is using 87.7 ergs in dry air as his conversion, when it should really be 96 for soft tissue.



So... Maybe I'll give ol' Capgun his 6 months back.

[Rennhack]

So, how come you guys are not testing out the mobile site and giving feedback on that?

http://www.nukeworker.com/m/

[GLW]

My answers:

((403*15/9)*(0.5^((16/12)/5.3)))=564.2 R/hr

or

((402.84*(6*((0.34693*0.000076)+(0.82606*0.000076)+(1.173237*0.999736)+(1.332501*0.999856)+(2.15857*0.0000111)+(2.5*0.00000002))))/(3^2))*(0.5^((16/12)/5.2714))=564.635214801879 R/hr

Of course 6CEN is in R/hr is not Rem/hr, and we need the dose rate so we have to convert it to Rem...

542 Rem/Hr

Capgun, where the heck did you get your number?

OBTW,....

full credit requires fully defining all terms,...

only ten months free GM for you,...

[Rennhack]

This weeks free Gold membership goes to the person that correctly answers the following 20 Trivia questions.  I'll even make it multiple guess.


    What plant In 2000 became the first U.S. nuclear power plant to receive a license extension?
        DC Cook
        Oconee
        Calvert Cliffs
        Indian Point

    This nuclear reactor is equal in size to ginna
        Kewaunee
        Dresden
        Fermi
        Ft Calhoun
        Big Rock Point

    The nuclear plant in Redwing Minnesota is:
        Minnesota Nuclear One (MiNO)
        Redwing Point
        Monticello
        Prarie Island
        Redwing Nuclear One (ReNO)

    Oconee is in...
        Flordia
        Virginia
        North Carolina
        South Carolina

    Iowa's only nuclear plant is named:
        Iowa Nuclear One
        Cedar River
        Centeral Iowa Nuclear Project (CINP)
        Madison County
        Duane Arnold

    The first commercial nuclear reactor to go online in Illinois was:
        Quad Cities
        Clinton
        Dresden
        Zion
        Chicago Pile 1 (CP-1)

    The Full name of the Fitzpatrick facility is...
        Jasen A. Fitzpatrick
        Just A Fitzpatrick
        Johnson A. Fitzpatrick
        James A. Fitzpatrick

    Ginna's unit is...
        Westinghouse 2-Loop boiling light water reactor
        Westinghouse 2-Loop pressurize light water reactor
        Westinghouse 4-Loop boiling light water reactor
        Westinghouse 4-Loop pressurize light water reactor

    Which plant has the most nuclear capacity in the southeastern United States
        Crystal River
        McGuire
        Catawba
        Oconee

    The Fitzpatrick plant is located on the same site as...
        Nine Mile Point
        Indian Point
        Ginna
        Three Mile Island

    Namesakes of the first nuclear powered submarines built by Electric Boat were...
        USS SKATE and USS SEADRAGON
        USS NAUTILUS and USS SEADRAGON
        USS SKATE and SEAWOLF
        USS NAUTILUS and SEAWOLF

    Wisconsins first commercial nuclear reactor was:
        Point Beach
        Nine Mile Point
        LaSalle
        Oyster Creek
        Kewaunee

    At which facility was Rennhack's first nuclear job?
        Indian Point 3
        DC Cook
        Callaway
        South Texas Project
        Palisades

    Perry is named after:
        Perry River
        Lake Perry
        Perry County
        Town of North Perry
        Jean-Luke Perry, French Physicist to discover fission in 9/02/10

    Fermi nuclear plant is named after:
        Lake Fermi
        Enrico Fermi, the first physist to split the atom
        Fermi County
        Fermi River
        Town of Fermi

    Farley is in
        Mississippi
        Tennessee
        Alabama
        Flordia

    Ginna is located near...
        Rochester, New York
        Buchanon, New York
        Oswego, New York
        Springfield, New York

    At which nuclear facility did Rennhack work his first outage?
        Callaway
        Indian Point 3
        DC Cook
        Palisades
        South Texas Project

    The world's first nuclear powered vessel was named the...
        USS SEAWOLF
        USS GEORGE WASHINGTON
        NAUTILUS
        USS RAY

    The first privatly-financed nuclear power plant built in the USA was:
        Zion
        Fermi
        Dresden
        Quad Cities
        Chicago Pile One (CP-1)

[RDTroja]

This weeks free Gold membership goes to the person that correctly answers the following 20 Trivia questions.  I'll even make it multiple guess.


    What plant In 2000 became the first U.S. nuclear power plant to receive a license extension?
        DC Cook
        Oconee
        Calvert Cliffs
        Indian Point

    This nuclear reactor is equal in size to ginna
        Kewaunee
        Dresden
        Fermi
        Ft Calhoun
        Big Rock Point

    The nuclear plant in Redwing Minnesota is:
        Minnesota Nuclear One (MiNO)
        Redwing Point
        Monticello
        Prarie Island
        Redwing Nuclear One (ReNO)

    Oconee is in...
        Flordia
        Virginia
        North Carolina
        South Carolina

    Iowa's only nuclear plant is named:
        Iowa Nuclear One
        Cedar River
        Centeral Iowa Nuclear Project (CINP)
        Madison County
        Duane Arnold

    The first commercial nuclear reactor to go online in Illinois was:
        Quad Cities
        Clinton
        Dresden
        Zion
        Chicago Pile 1 (CP-1)

    The Full name of the Fitzpatrick facility is...
        Jasen A. Fitzpatrick
        Just A Fitzpatrick
        Johnson A. Fitzpatrick
        James A. Fitzpatrick

    Ginna's unit is...
        Westinghouse 2-Loop boiling light water reactor
        Westinghouse 2-Loop pressurize light water reactor
        Westinghouse 4-Loop boiling light water reactor
        Westinghouse 4-Loop pressurize light water reactor

    Which plant has the most nuclear capacity in the southeastern United States
        Crystal River
        McGuire
        Catawba
        Oconee

    The Fitzpatrick plant is located on the same site as...
        Nine Mile Point
        Indian Point
        Ginna
        Three Mile Island

    Namesakes of the first nuclear powered submarines built by Electric Boat were...
        USS SKATE and USS SEADRAGON
        USS NAUTILUS and USS SEADRAGON
        USS SKATE and SEAWOLF
        USS NAUTILUS and SEAWOLF

    Wisconsins first commercial nuclear reactor was:
        Point Beach
        Nine Mile Point
        LaSalle
        Oyster Creek
        Kewaunee

    At which facility was Rennhack's first nuclear job?
       Indian Point 3
       DC Cook
        Callaway
        South Texas Project
        Palisades

    Perry is named after:
        Perry River
        Lake Perry
        Perry County
        Town of North Perry
        Jean-Luke Perry, French Physicist to discover fission in 9/02/10

    Fermi nuclear plant is named after:
        Lake Fermi
        Enrico Fermi, the first physist to split the atom
        Fermi County
        Fermi River
        Town of Fermi

    Farley is in
        Mississippi
        Tennessee
        Alabama
        Flordia

    Ginna is located near...
        Rochester, New York
        Buchanon, New York
        Oswego, New York
        Springfield, New York

    At which nuclear facility did Rennhack work his first outage?
        Callaway
        Indian Point 3
        DC Cook
        Palisades
        South Texas Project

    The world's first nuclear powered vessel was named the...
        USS SEAWOLF
        USS GEORGE WASHINGTON
        NAUTILUS
        USS RAY

    The first privatly-financed nuclear power plant built in the USA was:
        Zion
        Fermi
        Dresden
        Quad Cities
        Chicago Pile One (CP-1)

Without lookups, many guesses, no idea about Rennhack's history.

[Rennhack]

Without lookups, many guesses, no idea about Rennhack's history.

6 answers wrong.

For supposedly not knowing Rennhack's history, you are pretty close.

[Nuke Phantom]

This weeks free Gold membership goes to the person that correctly answers the following 20 Trivia questions.  I'll even make it multiple guess.


    What plant In 2000 became the first U.S. nuclear power plant to receive a license extension?
        DC Cook
        Oconee
        Calvert Cliffs
        Indian Point

    This nuclear reactor is equal in size to ginna
        Kewaunee
        Dresden
        Fermi
        Ft Calhoun
        Big Rock Point

    The nuclear plant in Redwing Minnesota is:
        Minnesota Nuclear One (MiNO)
        Redwing Point
        Monticello
        Prarie Island
        Redwing Nuclear One (ReNO)

    Oconee is in...
        Flordia
        Virginia
        North Carolina
        South Carolina

    Iowa's only nuclear plant is named:
        Iowa Nuclear One
        Cedar River
        Centeral Iowa Nuclear Project (CINP)
        Madison County
        Duane Arnold

    The first commercial nuclear reactor to go online in Illinois was:
        Quad Cities
        Clinton
        Dresden
        Zion
        Chicago Pile 1 (CP-1)

    The Full name of the Fitzpatrick facility is...
        Jasen A. Fitzpatrick
        Just A Fitzpatrick
        Johnson A. Fitzpatrick
        James A. Fitzpatrick

    Ginna's unit is...
        Westinghouse 2-Loop boiling light water reactor
        Westinghouse 2-Loop pressurize light water reactor
        Westinghouse 4-Loop boiling light water reactor
        Westinghouse 4-Loop pressurize light water reactor

    Which plant has the most nuclear capacity in the southeastern United States
        Crystal River
        McGuire
        Catawba
        Oconee

    The Fitzpatrick plant is located on the same site as...
        Nine Mile Point
        Indian Point
        Ginna
        Three Mile Island

    Namesakes of the first nuclear powered submarines built by Electric Boat were...
        USS SKATE and USS SEADRAGON
        USS NAUTILUS and USS SEADRAGON
        USS SKATE and SEAWOLF
        USS NAUTILUS and SEAWOLF

    Wisconsins first commercial nuclear reactor was:
        Point Beach
        Nine Mile Point
        LaSalle
        Oyster Creek
        Kewaunee

    At which facility was Rennhack's first nuclear job?
        Indian Point 3
        DC Cook
        Callaway
        South Texas Project
        Palisades

    Perry is named after:
        Perry River
        Lake Perry
        Perry County
        Town of North Perry
        Jean-Luke Perry, French Physicist to discover fission in 9/02/10

    Fermi nuclear plant is named after:
        Lake Fermi
        Enrico Fermi, the first physist to split the atom
        Fermi County
        Fermi River
        Town of Fermi

    Farley is in
        Mississippi
        Tennessee
        Alabama
        Flordia

    Ginna is located near...
        Rochester, New York
        Buchanon, New York
        Oswego, New York
        Springfield, New York

    At which nuclear facility did Rennhack work his first outage?
        Callaway
        Indian Point 3
        DC Cook
        Palisades
        South Texas Project

    The world's first nuclear powered vessel was named the...
        USS SEAWOLF
        USS GEORGE WASHINGTON
        NAUTILUS
        USS RAY

    The first privatly-financed nuclear power plant built in the USA was:
        Zion
        Fermi
        Dresden
        Quad Cities
        Chicago Pile One (CP-1)

Many were guesses, especially about Renhack.  No Lookups also.