Reactor Pulsing Laboratory Report University Of W Isconsion/Ne 506 Research Paper

2746 words - 11 pages

University of Wisconsin-Madison
NE 428 Nuclear Reactor Laboratory
Reactor Pulsing
Gianni Nelson
April 30, 2018
In operating power reactors, the neutron population generates a large amount of heat. This causes the temperature of the system to change in addition to its material densities, due to thermal expansion. Due to macroscopic cross sections being proportional to densities and temperatures, neutron flux spectrum depends also on the density of moderator, these changes in turn will produce some changes in reactivity. An important parameter in determining the operational characteristics and safety of nuclear reactors is the temperature coefficient of reactivity (). This parameter is important in reactor design, because the reactivity feedbacks influence the stability of the reactor. It will in addition assist in assuring appropriate reactor power boundaries so that the reactor does not reach supercritical (>1).
The temperature effects on reactivity in the University of Wisconsin-Madison Nuclear Reactor (UWNR) are studied while at a supercritical state. The UWNR was pulsed with multiple reactivity insertions, this defines conditions which establish stable heat generation. The delayed neutron fraction (), and the prompt neutron lifetime (lp) assist in determining the performance of a pulsating reactor.
Pulsating the reactor requires a large amount of energy which needs to be produced in a short period of time. The Fuchs-Nordheim model is used to quantitatively predict this reactor power during transient. Using this model, it is assumed that the delayed neutron effect can be neglected, and the reactor is adiabatic. Under these assumptions the period, pulse width, asymptotic period, peak power, and total energy released were measurements obtained from the power trace data. The Fuchs-Nordheim model of reactivity feedback of the prompt neutron lifetime and the negative temperature coefficient of reactivity was computed. Two methods of the Fuchs-Nordheim model were used to calculate the negative temperature coefficient. These models produced values which were relatively close 118.9 C and 119.26C. The computed values for the delayed neutron fraction and the prompt neutron lifetime were fairly close in comparison to the theoretical values of 0.007 and second presenting an error of less than 8%. The Fuchs-Nordheim model proved to be valid, as it qualitatively provided information about reactor pulses.
The focus of this experiment is to determine two parameters, the prompt neutron lifetime (lp) and energy coefficient of feedback reactivity (). The Fuchs-Nordheim model of reactivity is used to determine these parameters, in addition to the negative temperature coefficient ().
The assumptions used to complete this model are accomplished due to the reactor self-limiting power excursion, which occurs during a short period of time.
It is assumed that all heat loss is negligible (adiabatic approximation), the resulting change...


Research report about the correlation of age and gender - Murdoch university - Research report

1797 words - 8 pages 9 Running head: AGE-RELATED INCREASE IN EMPATHY Age and Empathy: A longitudinal study of age-related increase in empathy Shannen Chiw CT0308083 University of Murdoch AGE-RELATED INCREASE IN EMPATHY Abstract Empathy is a psychological and motivational ability to sense others’ distress. Empathy is defined as comprehending and sharing the sentiments of another. In this report, it will begin with the discussion of the increase in empathy with the

The Report of Mini Venture (Selling Used Textbooks) - Saint Mary’s University - research papers

1318 words - 6 pages 1 Saint Mary’s University The Report of Mini Venture (Selling Used Textbooks) 2 Introduction: My name is Hassan Ahmed AL-Hussain the first year business student in Saint Mary’s University. It is not the first time for me to work in business failed especially the small business. I used to work in several areas of business with my family, but the challenge that i have with this venture is dealing with price, because through the time i have worked

The economics of university accessibility - Ap seminar - research paper

1380 words - 6 pages Rahman who are research students from MABE, took data from the Canadian Labour Force Survey and discovered that higher tuition levels in the 1990s did in fact reduce the probability of university participation of persons aged 17-19 (Johnson, 2005). Furthermore, university applications are getting more and more competitive; which minimizes the possibility of acceptance and scholarship opportunity. Our main question is, are students restricted to

Arabic Architecture and Influence - University of Colorado Boulder - Research Paper

2482 words - 10 pages no doubt that it influenced early modern Europe and, therefore has relevance in today’s world. Specifically, European art and architecture borrow heavily from the Islamic world. As seen in this paper, the pointed, four-centered, and horseshoe arch that are evident in most of the ancient buildings in Europe borrow heavily from Islamic architecture. The same can be said about domes. In addition, music, decorative art, ornament style and carpets all


2264 words - 10 pages “COUNTERING THE EFFECTS AND OF SENDENTARY NATURE AND PHYSICAL INACTIVITY ON KNOWLEDGE WORKERS” MELVIN KAAS 216070046 KNOWLEDGE ECONOMY RESEARCH REPORT 1 29 AUGUST 2018  MRS WAFEEQUA DINATH Table of contents pg. 1 Introduction 1 2 Understanding knowledge workers 2 2.1 What are knowledge workers? 2 2.2 Characteristics of knowledge workers 2 3. Physical and mental effects of knowledge work 4 3.1

Principles of Forensic Investigation - griffith uni/principles - Report Laboratory

485 words - 2 pages for the Mandelin reagent-controlled substances. Gloves were changed before commencement of the biological presumptive test, the procedure which tested the unknown point of entry stain was folding a filter paper in half twice. Dipped the filter into known controlled vial of blood, then filter paper reopened. KM reagent was applied to the filter paper (couple of drops) noted that there was no colour change until the hydrogen peroxide drops were

The Antecedents, Facilitators and Consequences of Parasocial Relationships - University of Toronto/PSY424 - Research Paper

3941 words - 16 pages ; secondly, what processes and media use over time would facilitate PSR between media user and media figures; thirdly, how PSI might, as its originators put it, be “integrated into the matrix of usual social activity” (Horton & Wohl, 1956) and what impact would it bring. This paper attempts to answer the above questions by reviewing existing literatures and give suggestions for future research directions on the topic. Literature Review 1.1

socail media effects on romantic relationships - University Of South Alabama, fundimentals of communication research - Reseach paper

1815 words - 8 pages Free , solidarity, transparency, cheating etc. In this paper, the role that social media plays on romantic relationships is investigated. This study is hypothesized that social media can have negative and positive impacts on romantic relationships. The following literature reviews have attempted to demonstrate and support this hypothesis. Cizmeci, E. states the use of a mobile device can sum up to be a good thing. When trying to maintain a

Research Paper Database Management Systems - MIS Howard University - Research Paper

3134 words - 13 pages 1 DATABASE MANAGEMENT SYSTEMS (DBMS) Database Management Systems (DBMS) How they affect our everyday life. Xavier Edwards Howard University Management Information Systems 001-01 Dr. Agarwal October 31, 2018 Abstract A database is a structured set of data held in computer or software, especially one that is accessible in various ways. Databases have been in existence since the early 1960s; however, the most universally used type of database was

Augmented Reality Research Paper - West Chester University, IST - Research Paper

1034 words - 5 pages Augmented Reality and Video Games Augmented Reality and Video Games Abstract This paper is about views in Augmented Reality and video games. The advancements of entertainment and types of games with Augmented Reality are presented. These topics are then analyzed by the technology usage, and genre. Augmented Reality is an interactive experience of a real-world environment where the objects that reside in the real-world are "augmented" by computer

Unknown report: Streptococci vs Staphlococci - SFSU microbiology - research paper

1529 words - 7 pages Kaylee Kelley 211.3 5/16/17 Unknown Report Bio 211 The study of microbiology requires not only an academic understanding of the microscopic world but also a practical understanding of lab techniques and procedures in order to to identify and control microorganisms(MOs). The proper identification of a microorganism is not only important in a microbiology lab but also in the medical, industrial, and pharmaceutical fields. In this lab report, lab

Science report on the Bionic Eye - Science - Research Paper

727 words - 3 pages Research Report I The Bionic Eye The bionic eye is a device that was designed to restore the sense of vision to people with retinitis pigmentosa and age-related macular degeneration. A bionic eye system consists of a small digital camera, external processor and an implant with a microchip and stimulating electrodes which get surgically placed in the back of the eye. For people to benefit from this technology they will need to have some remaining

Performing Vocal Music of the Renaissance - University of Mississippi - Introduction to Music Research (Graduate Level) - Research Paper

2309 words - 10 pages Culpepper 2 Richard Culpepper 8 December 2016 Dr. Thomas Peattie Final Research Paper Performing Vocal Music of the Renaissance Music has existed for thousands of years, if not longer. The earliest musical notation known to date is from a cuneiform tablet created ca. 2000 BC, found in modern day Iraq in the 1960s.[footnoteRef:1] The oldest known musical instruments are even older than that. At an age of ca. 40,000 years old, four carved-bone

Theory to Practice - First-Generation College Students - University of Wisconsin Oshkosh/Theory Class - Research Paper

3471 words - 14 pages population. Problem The 2018 Trends Report discusses the issue FGCS face when attending post-secondary education. According to this report by Dr. Cynthia Teniente-Matson, President of Texas A&M University (TAMU) at San Antonio, FGCS should be immersed in a program before the school semester starts (2018). As stated by Dr. Teniente-Matso, the program should focus on coaching the students on personal, social, and academic success. Furthermore

An Analysis of How Adolescents Form Friendships - University at Albany - Research Paper

1927 words - 8 pages Free attractiveness plays and the perception of attractive people when regarding friendship “Physically attractive people are judged to be kinder, stronger, more outgoing, more interesting, more exciting dates, more exciting, nurturing, and better people.” (Roberts-Griffin 4). Those who are attractive are generally treated better and more popular due to the association with desirable traits. The research attributes friendship formation to proximity