# Register now to access 7 million high quality study materials (What's Course Hero?) Course Hero is the premier provider of high quality online educational resources. With millions of study documents, online tutors, digital flashcards and free courseware, Course Hero is helping students learn more efficiently and effectively. Whether you're interested in exploring new subjects or mastering key topics for your next exam, Course Hero has the tools you need to achieve your goals.

2 Pages

### HW4Problem07

Course: NE 400, Spring 2010
School: N.C. State
Rating:

Word Count: 423

#### Document Preview

number A of potential accidents in pressurized water reactors can lead to over power transients where the reactor power exceeds normal operating levels. One concern in setting the high power reactor trip is that the maximum fuel temperature not exceed the fuel melt temperature. A PWR is to be designed to operate at 3411 Mwt. For the given data, determine the number of fuel rods necessary to prevent fuel melt at...

Register Now

#### Unformatted Document Excerpt

Coursehero >> North Carolina >> N.C. State >> NE 400

Course Hero has millions of student submitted documents similar to the one
below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.

Course Hero has millions of student submitted documents similar to the one below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.
number A of potential accidents in pressurized water reactors can lead to over power transients where the reactor power exceeds normal operating levels. One concern in setting the high power reactor trip is that the maximum fuel temperature not exceed the fuel melt temperature. A PWR is to be designed to operate at 3411 Mwt. For the given data, determine the number of fuel rods necessary to prevent fuel melt at the reactor trip set point. Derive the equations necessary to compute the temperature drop across the rod. You may assume uniform volumetric heat generation rate and the fuel and cladding are in contact at the clad inner radius such that the temperature drop across the gap can be given in terms of a gap conductance HG. Problem Data Fuel Melt Temperature Reactor Trip Set Point Fraction of heat produced in fuel Rod Diameter Clad Thickness Gap Conductance Coolant Temperature Convective Heat Transfer Coefficient Clad Thermal Conductivity Power Peaking Factor Rod Height SOLUTION 4980 3718 97.4 0.374 0.0225 1000 590 8500 9.6 2.43 12 F Mwt % inches inches Btu/Hr-ft2-F F Btu/Hr-Ft2-F Btu/Hr-Ft-F ft The general solution for the temperature drop across the fuel region of a solid cylindrical fuel rod with temperature dependent conductivity thermal is r for T ( R) k (T )dT 0 T (0) k (T )dT + 0 R 0 1 q(r )r dr dr = 0 r 0 q(r ) = q Note: r q(r )r dr = = 0 qrdr 0 r qr 2 2 q = q( Ro )2Ro = q(r)2rdr = qR R 0 2 Fuel Rod 09 R 0 1 r r q(r )r dr = = 0 R 0 qr dr 2 qR 2 4 q = 4 Therefore In addition we have T ( R) k (T )dT 0 T ( 0) k (T )dT + 0 q =0 4 (a) 1 R 1 1 T ( R ) T = q( R ) R + ln o + R hR H G Ri k c i c o or T ( R ) T = q 2 1 1 R 1 + ln o + R hR H G Ri k c i c o (b) For a given fuel centerline temperature, Equations (a) and (b) contain the unknowns T ( R ) and q which may be solved for iteratively. Solving Equation (a) for q T ( 0) (q)1 = k (T )dT 0 k (T )dT 4 = 9684.8 0 T ( R) k (T )dT 4 0 T ( R) (c) and Equation (b) for q 1 1 R 1 (q) 2 = 2 [T ( R) T ] + ln o + R hR H G Ri kc i c o 1 = [T ( R) 590] 66.948 (d) We therefore have two equations in the two unknowns, q and T ( R ) . The solution is iterative and gives q = 63,078.9 Btu hr ft = qmax T ( R) = 1532.2 F which gives for the number of fuel rods n= & f QFq qmax H = (0.974)(3718 103 )(3413)(2.43) = 39,678 (63,078.9)(12) Fuel Rod 09
Find millions of documents on Course Hero - Study Guides, Lecture Notes, Reference Materials, Practice Exams and more. Course Hero has millions of course specific materials providing students with the best way to expand their education.

Below is a small sample set of documents:

N.C. State - NE - 400
Diffusion theory gives that the volumetric heat generation rate within a cylindrical fuel rod isq (r ) = q0 I 0 (r / L ) where L is the thermal diffusion length. Assuming the fuel is 4% enriched UO2, compare the temperature distribution in the fuel rod
N.C. State - NE - 400
A certain pressurized water reactor design has operating characteristics as listed below. During operation, the fuel undergoes restructure resulting in a central void of radius rv = 0.0208 inches. Assuming the same total energy is produced, compute and co
N.C. State - NE - 400
The one-dimensional Cartesian geometry illustrated below consists of two uniformly heated slabs in contact at position x1 . The right slab is perfectly insulated at x = L and convectively cooled by a coolant of temperature T at x = 0 . Assuming the system
N.C. State - PY - 528
NE528 Fall 2009 HW#1 (total 90 points) Due Wednesday, September 9 by class time1. (10 points) Derive the expression of the Debye length for a pure hydrogen plasma in a steady-state situation, where electron and ion temperatures are not equal, i.e. Te Ti
N.C. State - PY - 528
NE 528 Fall 2009 Mid Term Take Home Exam (Due on Friday November 6 on or before 5:00pm) 20% of total course grade 1) (20 points)Derive the dispersion relation for electron plasma wave in presence of a steady-state uniform magnetic field where B = z Bo an
N.C. State - PY - 528
NE528 Fall 2009 HW#3 (total 80 points) Due Wednesday, October 7 by class time1. (40 points) We derived the expression for the current density the diamagnetic current at equilibrium B p condition and have shown that it is given by J = . B2 Now, consider a
N.C. State - PY - 528
NE528 Fall 2009 HW#4 (Total 60 points) Due Wednesday, October 21st by class time1. (30 points)In obtaining the dispersion relation for electron and ion plasma waves, perturbations were assumed for velocity, density and E-field. Solution requires lineari
N.C. State - PY - 528
NE528 Fall 2009 HW#2 (total 80 points) Due Wednesday, September 23 by class time1. (30 points)A fully ionized, uniform, hydrogen plasma has a density (ne = ni = n) in orthogonal uniform gravitational and magnetic fields, where the gravitational field is
N.C. State - PY - 528
NE528 HW#5 Fall 2006 (Total 70 points) Due Monday, November 16 by class timeProblem 1 (20 points) In many plasma devices for plasma-aided manufacturing processes, a mixture of gases, mainly etchant gases mixed with inert gases, forms the plasma. Such mul
N.C. State - ISE - 311
N.C. State - ISE - 311
N.C. State - ISE - 311
N.C. State - ISE - 311
N.C. State - ISE - 311
ISE 311 POP Quiz Lavelle, Spring 2009 YOURNAMEHERE(pleaseprint): This is an OPEN BOOK, CLOSED NEIGHBOR Pop Quiz. Please put all work on this paper (use the back if necessary). (1) The cost of a first-class postage in 1970 was \$0.06 and the cost of posta
N.C. State - PY 208M - 87878
N.C. State - PY 208M - 87878
N.C. State - PY 208M - 87878
N.C. State - PY 208M - 87878
KProblem 1 (7 pts) A circuit hangs in the x-y plane. Some coils (not shown in the diagram) make a sizeable magnetic field in the shaded region (of length a and width b) and the wire experiences a force in the +z direction (see axesconvention on page 3).
University of Phoenix - BIO - BIO 100
Basic Processes By: Robin SteppReproduction is interesting in any form so when asked to chose a basic process and describe how it differs among bacteria, grasshoppers, fish and bear I had to choose it over the other choices I had. While reading about eac
University of Phoenix - ACC - 497
FASB Accounting Standards Codification Orientation Paper ACC/497FASB Accounting Standards Codification Orientation Paper The FASB Accounting Standards Codification (FASB ASC) organized thousands of GAAP pronouncements under approximately 90 accounting an
Nova Scotia Agr. - BUS - 210
Chapter 7 Cost-Volume-Profit AnalysisExercisesE7-25, P7-43, P7-51*E7-25: *E7-28 Traditional Sales \$1,000,000 Less: cost of goods sold \$750,000 Gross margin Less operating expenses Selling expenses \$75,000 Administrative expenses \$75,000 Net income Cont
Ben-Gurion University - CHEMISTRY - PYSICAL CH
IntroductionSince the scanning electron microscopy (SEM) techniques start just before four decade it's already has used extensively to characterize the surface properties of different specimen, but this cute techniques will be useless if we do not recogn
Art Institute of Colorado - ART - 1000
consci ousness1. Hallucinations, brain wave changes and feeling bored are all found in: A. B. C. D. E. F. G. 2. sleep3.Which of the following is notcharacteristic of REM sleep? A. Heart and breathing ratesi ncrease. B. The eyes move rapidly under clo
Ben-Gurion University - CHEMISTRY - PYSICAL CH
Presented to : Prof. Evgeny Katz Name : Mahmud Diab I.D : 066589607IntroductionRecent research on world-wide energy consumption predicts that by the year 2030 our energy consumption will have increased by 50%. Scientists are also becoming more aware of
McMaster - COMPUTER S - 1B03
Using XHTML to Create Web Pages 1.1 Defining Blended HTML, XHTML, and CSS HTMLo olanguage used to create Web pages create code to describe the structure of a Web page in terms of paragraphs,lists,tables,forms etcXHTMLoVariation of HTML that more stri
McMaster - COMP SCI - 1B03
7A-XHTML-T01 Using XHTML to Create Web PagesObjectives Learn about the Internet and the World Wide Web Identify and use tags on a Web page Save a text document as an XHTML file Document XHTML code using comments Specify headings Format Web page textXP
McMaster - COMP SCI - 1B03
XP7B-XHTML-T02 Creating HyperlinksObjectives Understand communications technology Create a link to a named section on the same page Create a link to documents within the same Web site Create a link to other Web sites on the InternetXPNew Perspectives
McMaster - COMP SCI - 1B03
XP8-CSS-T03 Introducing Cascading Style SheetsObjectivesXP Recall that XHTML creates structure for page content. CSS is for presentation (formatting) of your Web pages. Learn about Cascading Style Sheets Write CSS styles Choose the correct style to fo
McMaster - COMP SCI - 1B03
9-Access-T01 Database FundamentalsTutorial Objectives Define the terms field, record, table, relational database, primary key, and foreign key Identify the components of the Microsoft Access window Create and save a table in Datasheet view Enter field n
McMaster - COMP SCI - 1B03
CS1BA311A - Access - Import1CS1BA311A - Access - Import2CS1BA311A - Access - Import3CS1BA311A - Access - Import4CS1BA311A - Access - Import5CS1BA311A - Access - Import6CS1BA311A - Access - Import7CS1BA311A - Access - Import8CS1BA3
McMaster - COMP SCI - 1B03
CS1BA311B - Access - QBE1CS1BA311B - Access - QBE2CS1BA311B - Access - QBE3CS1BA311B - Access - QBE4CS1BA311B - Access - QBE5CS1BA311B - Access - QBE6CS1BA311B - Access - QBE7CS1BA311B - Access - QBE8CS1BA311B - Access - QBE9CS1
McMaster - COMP SCI - 1B03
12-Word-T06 Session 6.1 Using Mail MergeCOMPREHENSIVEObjectives Learn about the mail merge process Use the Mail Merge task pane Select a main document Create a data source Insert mail merge fields into a main document Edit a main document Preview a mer
McMaster - COMP SCI - 1B03
Access- C reating a DatabaseI n t roduction to Database ConceptsOrganizing DataData is valuable resource to anhy business Customers names Addresses Contract amounts DatesOrganzing ,storing,maintain,retrieving and sorting data are critical activities F
McMaster - COMP SCI - 1B03
Information PresentationELEMENTSOFPAGE DESIGN Page design layouts are most often depicted as gray blocks (the text) against a white background (the page) In a text heavy document, a good layout is critical to the readers comfort and ability to navigate
McMaster - COMP SCI - 1B03
I n t roducing Cascading Style SheetsPurpose of XHTM L is to create structure for the page content.Cascading Style Sheets (CSS) is used for the presentation-the formatting of your Web pages. Cascading Style Sheets provides a way to easily and efficientl
McMaster - COMP SCI - 1B03
Heading 1Heading 2i like cherry :)&lt;3 cherry is on the next line? ou lalala break it off boy.nananan touch my body lalalala i like my men to be strong and i'm going to emphasize that special characters : , &lt;,&gt; E=mc2,02 1 2 3 4 tell me that you love me mo
McMaster - COMP SCI - 1B03
MySpace.com|HomeSearchTheWebMySpaceHelp|SignOu Home | Browse | Search | Invite | Rank | Mail | Blog | Favorites | Forum | Groups | Events | Games | Music | ClassifiedsPreview&quot;:)&quot; Male 99yearsoldPreviewisinyourextendednetworkUnitedStatesPreview's
McMaster - COMP SCI - 1B03
Week 4 Information PresentationLecture 4A Organization of Document Elements9/27/2010CS1BA3 f101Introduction Organization of foreground elements on a background. Repetition (of patterns and rhythms in your document) is the key to simple, understandab
McMaster - COMP SCI - 1B03
Week 4 Information PresentationLecture 4B Incorporating Graphic Elements9/30/2010cs1ba3 f101Introduction What is a graphic ? Why use a graphic ? When is a graphic not suitable ? How do readers react to graphics ?9/30/2010cs1ba3 f102Topics Place
McMaster - COMP SCI - 1B03
Creating a Multiple Page ReportFormatting Headings with Quick Styles To give a document a polished look, you can use Quick Styles, allow you to apply an entire set of formatting choices with one click QUICK STYLE typically applies many formatting options
McMaster - COMP SCI - 1B03
Using Mail MergeCreating a Form Letter, Mailing Labels, and a List Form Letter-contains the information she wants to send to all clients Contrain specific details for individual clients,name,address and each clients favourite class and instructor Mail Me
McMaster - COMP SCI - 1B03
Customizing Word and Automating Your WorkCreating Templates Common template elements: o o o o Boiler plate text and graphics, material you want to appear in every document created using the template Quick part- stored words, blocks of text, or graphics
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
ECE 301, A Digital Dierentiator DemonstrationInput: Given an band-limited input x(t) with bandwidth WM = 2.5 . Sample it with sampling period T = 2/5 (s = 5 ). Let x[n] denote the sampled discrete-time (digital) array. Goal: Design a discrete-time proces
Purdue - ECE - 302
ECE 301, A Half-Time Delay DemonstrationInput: Given an band-limited input x(t) with bandwidth WM = 2.5 . Sample it with sampling period T = 2/5 (s = 5 ). Let x[n] denote the sampled discrete-time (digital) array. Goal: Design a discrete-time processing
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302
Purdue - ECE - 302